What is Impulse: Definition and 929 Discussions

In the field of consumer behavior, an impulse purchase or impulse buying is an unplanned decision by a consumer to buy a product or service, made just before a purchase. One who tends to make such purchases is referred to as an impulse purchaser, impulse buyer, or compulsive buyer. Research findings suggest that emotions, feelings, and attitudes play a decisive role in purchasing, triggered by seeing the product or upon exposure to a well crafted promotional message.

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  1. D

    I still need someone smart to explain 2 me momentum and Impulse throughly .

    I still need someone smart to explain 2 me momentum and Impulse throughly... 1. A hunter has rifle that can fire a.05 kg bullets with a speed of 900 m/s. A 40 kg leapord springs at him at 10 mm/s. How many bullets would the hunter need to stop the tiger dead in its tracks...
  2. D

    Need Help with Momentum and Impulse? Need some one smart

    Need Help with Momentum and Impulse?? Need some one smart... The only formulas that were provided were 1. I =Δp 2. mΔv 3. I=FΔt 4. KE= 1/2 mv^2 5. PE= mgΔh 6. ΔPE= ΔKE 7. W= F*D 8. W= ΔKE Momentum Before Collision = Momentum After Collision 9. m`av`a + m`bv`b = m`av`a + m`bv`b...
  3. D

    Need Help with Momentum and Impulse? Need some one smart

    Need Help with Momentum and Impulse?? Need some one smart... The only formulas that were provided were 1. I =Δp 2. mΔv 3. I=FΔt 4. KE= 1/2 mv^2 5. PE= mgΔh 6. ΔPE= ΔKE 7. W= F*D 8. W= ΔKE Momentum Before Collision = Momentum After Collision 9. m`av`a + m`bv`b = m`av`a + m`bv`b...
  4. I

    Calculating Impulse in a Collision

    Homework Statement Before a collision, a 26 kg object is moving at +10 m/s. Find the impulse that acted on the object if, after the collision, it moved at the following velocities. a) +8.0 m/s b) -8.0 m/s Homework Equations Impulse = change in momentum = mass * change in...
  5. E

    The inverse impulse response

    hello all i just want to know why we use the inverse impulse response ? and i need a practical example on it ?/ and how?/? i need Quiqly answer as soon as u can please...:smile:
  6. M

    Impulse given, find speed

    Hey everyone, Homework Statement A spacecraft is separated into two parts by detonating the explosive bolts that hold them together. The masses of the parts are 1200 kg and 1900 kg. The magnitude of the impulse on each part from the bolts is 400 N·s. With what relative speed do the two...
  7. S

    Solving Impulse Homework: A, B, C

    Homework Statement A 110 kg fullback is running at 4.4 m/s to the east and is stopped in 0.75 s by a head-on tackle by a tackler running due west. A. Calculate the impulse exerted on the fullback. B. Calculate the impulse exerted on the tackler. C. Calculate the average force exerted on...
  8. E

    What Determines the Velocity of a Baseball After Being Hit?

    Homework Statement My question is: Now assume that the pitcher in Part D throws a 0.145 kg baseball parallel to the ground with a speed of 32 m/s in the +x direction. The batter then hits the ball so it goes directly back to the pitcher along the same straight line. What is the ball's...
  9. B

    What is the magnitude of the impulse imparted by a kicked ball to the foot?

    Homework Statement A ball of mass 0.4 kg is initially at rest on the ground. It is kicked and leaves the kicker’s foot with a speed of 5.0 m/s in a direction 60◦ above the horizontal. The magnitude of the impulse k~Ik imparted by the ball to the foot is most nearly The Attempt at a...
  10. E

    Calculate Impulse of 0.4 kg Ball Kicked at 5m/s

    Homework Statement A ball of mass 0.4 kg is initially at rest on the ground. It is kicked and leaves the kicker’s foot with a speed of 5.0 m/s in a direction 60◦ above the horizontal. The magnitude of the impulse k~Ik imparted by the ball to the foot is most nearly: 1. ||J|| = 1Ns. 2...
  11. D

    Calculating Impulse & Kinetic Energy of Collision

    A 5 kilogram ball initally rests at the edge of a 2 meter long, 1.2 meter high frictionless table. A hard plastic cube of mass .5 slides across the table at a speed of 26 meters per second and strikes the ball, causing the ball to leave the table in the direction in which the cube was moving...
  12. K

    Help Solve Impulse Problem w/ Pendulum Bob

    HELP!Impulse problem Homework Statement A bullet of mass m and speed v passes through a pendulum bob of large mass M and emerges with speed v/2. the bob is at the end of a sting of length l.What impulse is delivered to the bob by the bullet in this case.The Attempt at a Solution...
  13. I

    Momentum and impulse of a volleyball

    OK I have 1 more question for today... Homework Statement A 0.45kg volleyball travels witha horizontal velocity of 3.2m/s over the net. You jump up an hit the ball back witha horizontal velocity 7 m/s. If the contact time is 0.047s, what is the average force on the ball? Homework...
  14. R

    Impulse and Momentum Problem

    Homework Statement A small 120kg rocket is fired vertically, propelled by an engine with a thrust of 6500N. The engine ejects gas at a rate of 4.5kg/s. a) Calculate the change in velocity of the gases relative to the engine b) after 20 s what will be the rockets accleration. Homework...
  15. J

    Impulse and momentum of a sled

    Homework Statement a sled slides along a horizontal surface on which the coeffient of kinetic friction 0.25. its veocity at pt A is 8m/s at pt B its 5m/s. use impulse-momentum theorem to find how long the sled takes to travel from A to B Homework Equations P=J The Attempt at a...
  16. S

    Momentum Change and Impulse in Colliding Balls

    Homework Statement There are two balls traveling and they collide. How do there momentum change. What is the impulse done to ball B by ball A. Homework Equations delta momentum = 0 impulse = ? The Attempt at a Solution the first part i think its C becuz A is moving up and...
  17. K

    Jumping impulse physics homework

    Homework Statement When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 75 kg man just before contact with the ground has a speed of 6.0 m/s. (a) In a...
  18. R

    What is the impulse given the wall?

    Homework Statement A tennis ball of with a mass of .045 kg and speed of 25 m/sec strikes a wall at an angle of 45 degrees and rebounds with the same spped at 45 degrees. What is the impulse given the wall? Homework Equations I= pf-pi/t The Attempt at a Solution I= mv-mv/t...
  19. N

    Maximizing Distance and Angular Velocity: Solving a Billiard Ball Problem

    Homework Statement A billiard ball is struck by a cue as is shown in the figure. The line of action of the applied impulse is horizontal and passes through the center of the ball. The initial velocity v0 of the ball after impact, its radius R, its mass m, the acceleration due to gravity g, and...
  20. GRB 080319B

    Trying to prove that Impulse = change in momentum

    Homework Statement I was trying to prove that Impulse = change in momentum. I end up proving it, but I'm not sure if the two assumptions I made are true. I also am not sure if my initial equations are completely true (I got them from a conceptual physics book which isn't heavy on equations...
  21. Z

    Impulse and Momentum of a belly flop

    Homework Statement A relative of yours belly flops from a height of 2.50 m (ouch!) and stops moving after descending 0.500 m underwater. Her mass is 62.5 kg. (a) What is her speed when she strikes the water? Ignore air resistance. (b) What is the magnitude of her impulse between when she...
  22. S

    Is Lower Impulse Better for Surviving a Car Crash?

    I just need some quick input. When dealing with impulse and say a car crash, would you want to have a larger impulse and thus a larger change in momentum or a smaller impulse and smaller change in momentum? It seems to me that with a car going say 50 km/hr with a mass of 1000kg then your...
  23. S

    What is the net impulse and average force on a ball caught in hand?

    Homework Statement A ball of mass 1.5 kg is traveling downward at a speed of 10 m/s. It comes to rest in your hand in .25 s. What is the net impulse exerted on the ball? What is the average force exerted by the hand on the ball (Don't forget the gravitational force.) Homework Equations...
  24. X

    What is the impulse delivered by the floor in a 2D bounce pass?

    Homework Statement To make a bounce pass, a player throws a 0.60 kg basketball toward the floor. The ball hits the floor with a speed of 6.5 m/s at an angle of 58° from the vertical. If the ball rebounds with the same speed and angle, what was the impulse delivered to it by the floor...
  25. K

    Comparing Impulse in Collisions: Which Ball Experiences a Greater Magnitude?

    Homework Statement 2 equal mass balls (one red one blue) are dropped from the same height and rebound off the floor. the red ball rebounds to a higher position. which ball is subjected to the greater magnitude of impulse during its collision with the floor? a. it's impossible to tell...
  26. F

    How long to fire a small rocket. Impulse problem.

    1. Small rockets are sued to make small adjustments in the speed of satellites. One such rocket has a thrust of 59N. If it is fired to change the velocity of a(n) 74000kg spacecraft by 54cm/s, howl ong should it be fired? Answer in units of s. 2. F=deltaP, delta t; F=mVf-mVi...
  27. M

    The Impulse and Average Force of a Bouncing Handball

    A 60g handball moving with a speed of 5m/s strikes the wall at a 40 degree angle with the norm, and then it bounces off with the same speed at the same angle with the norm. It is in contact with the for 2.0ms. a)What is the average force exerted by the ball on the wall? b)The rebounding...
  28. B

    Force vs Time Collision: Find Speed of 66-g Tennis Ball

    Homework Statement The Figure shows an approximate representation of the contact force versus time during the collision of a 66-g tennis ball with a wall. The initial velocity of the ball is 4.375E+1 m/s perpendicular to the wall. What is the speed of the tennis ball after the collision...
  29. G

    How can the impulse of a bouncing ball be calculated?

    Homework Statement Ok, I am supposed to find the impulse of a .12 kg ball dropped from a height of 1.25 meters. It bounces back from the floor to a height of .6 meters. Not really sure of all the equations needed, I need a lot of help.
  30. T

    Impulse Question Homework: Find Magnitude of Impulse Exerted by Particle B on A

    Homework Statement Two particles A and B, of mass 0.3 kg and m kg respectively, are moving in opposite directions along the same straight horizontal line so that the particles collide directly. Immediately before the collision, the speeds of A and B are 8 m s–1 and 4 m s–1 respectively. In...
  31. N

    Linear Motion to Angular Motion via an Impulse

    I am interested in how impulse turbines work. Supposing a mass of water (in kilograms), m, is expelled by a jet at a given velocity (in meters per second), v, its momentum (in Newton-seconds), p, is the product of these quantities: p = mv. Also, a paddlewheel’s angular momentum (in...
  32. C

    Mag of impulse required to change speed question.

    Homework Statement A proton has mass 1.7x10-27 kg. What is the magnitude of the impulse required in the direction of motion to increase its speed from 0.995c to 0.998c? Where c is the speed of light. Homework Equations Im not quite sure of what equation is supposed to be used. I tried using...
  33. S

    Solving a Ball Dropped from 1.75m: Velocity and Impulse Calculations

    Homework Statement A ball is dropped from a height of 1.75m. It bounces on the floor and reaches a maximum height of 1.35m above the floor. The ball's weight is 98.5g. a) What is the ball's velocity just before and just after the bounce? b) How large is the impulse that the ball gets in the...
  34. L

    CO2 Power - Designing an Impulse and/or Reaction Turbine

    I'm trying to determine the feasibility of a project, but have not yet taken fluid dynamics (next quarter). I'm trying to figure out how much power could be produced with a CO2 powered turbine. The turbine will be activated for only a few seconds at a time, with speeds under power ranging...
  35. R

    What is the Impulse and Average Force in a Collision between a Ball and Wall?

    Homework Statement A 300g ball with a speed v of 6.0m/s strikes a wall at an angle theta of 30 degrees and then rebounds with the same speed and angle. It is in contact with the wall for 10ms. In unit-vector notation, what are (a) the impulse on the ball from the wall and (b) the average force...
  36. N

    Railway truck impulse physics homework

    A railway truck S of mass 2000 kg is traveling due east along a straight horizontal track with constant speed 12 m s–1. The truck S collides with a truck T which is traveling due west along the same track as S with constant speed 6 m s–1. The magnitude of the impulse of T on S is 28 800 Ns...
  37. J

    What is the impulse of friction?

    I was working on a basic momentum/impulse problem where a block is pushed by a force P over a time T that is plotted on a graph...Kinetic Friction is given but how would I incorporate that into the equation to find the velocity? I know the impulse is the area under the curve... mv_{1} +...
  38. M

    Impulse Momentum: Comparing Forces

    [b]1. 2) A car is moving at 60.0 m/s and crashes into a wall. The messenger is not wearing his seat belt. a. What is the average force acting on the passenger of 70 kg if he is brought to rest by a collision with the windshield and dashboard that lasts 3.5 ms. b. Compare this value of the...
  39. E

    Finding Total Impulse of Charged Parallel-Plate Capacitor in Magnetic Field

    Homework Statement A charged parallel-plate capacitor (with uniform electric field \mathbf{E} = E\hat{\mathbf{z}} ) is placed in an uniform magnetic field \mathbf{B} = B\hat{\mathbf{x}} (a) Find the electromagnetic momentum in the space between the plates. (b) Now a resistive wire is...
  40. C

    Impulse Problem: Find Mass, Height & Impulse

    Homework Statement A ball of mass .110 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of .800 m. What impulse was given to the ball by the floor? Homework Equations I=ΣFΔt Δp=I The Attempt at a Solution Could someone please tell...
  41. N

    Impulse of objects in a physics simulator

    I am making a physics simulator for a computer. All objects have their translational and rotational momentums stored, and each frame, objects are moved according to these values. Upon collisions, momentum is transferred from one object to the next. However, I do not know how to find how...
  42. P

    Impulse and momentum of two particles

    Homework Statement Two particles have mass 0.12kg and 0.08kg respectively. They are intially at rest on a smooth horizontal table. Particle A is then given an impulse in the direction AB so that it moves with speed 3m/s directly towards B. Immediately after the particles collide the speed...
  43. N

    Linear momentum and impulse problem

    [SOLVED] Linear momentum and impulse problem Homework Statement A 3.0-kg steel ball strikes a massive wall with a speed of 10 m/s at an angle of 60 degrees with the surface. It bounces off with the same speed and angle (see Figure 9.30). If the ball is in contact with the wall for 0.20 s...
  44. L

    Impulse and Net Force Equations

    I have a problem in trying to express a net force equation for a falling elastic object when collision ensues. For instance, you drop a spring with a spring coefficient k. the spring compresses a distance x after a time t for a maximum time of tf and distance xf. the spring has a weight W...
  45. S

    Question on impulse, does it assume elastic collision?

    A problem I am working on for a project... Force required to hit a golf ball 76.2 m/s Does the impulse assume the collision is perfectly elastic? I am doing a problem on golf... mass of golf ball .0459 kg velocity of ball is 76.2 m/s time of interaction is .0005 seconds coefficient...
  46. Y

    Substitution for impulse in recurrence equation

    Hi, I was wondering what substitution to try when finding a particular solution for a recurrence equation with a linear combination of impulses on the right side of the equation. I think an example will clarify this. Given the recurrence equation y[k+2]-4y[k]=\delta [k] + 2\delta [k+1]...
  47. K

    Momentum, Impulse and consevation of momentum?

    Homework Statement Homework Equations \vec{p} = m\vec{v} F_{net} \times (t_{2} - t_{1} )= m_{2} v_{2} - m_{1} v_{1}The Attempt at a Solution So part A was easy, All i did was find the Velocity just before it hits using constant acceleration formula and times that velocity by mass. So, my...
  48. L

    Conservation of momentum and Impulse

    Homework Statement A large plate is dropped and breaks into three large pieces. The pieces fly apart parallel to the floor. As the plate falls, its momentum has only vertical components, none parallel to the floor. After the collision, the component of momentum parallel to the floor must...
  49. P

    Law of Impulse Preservation in Positron-Electron Annihilation

    Annihilation (connecting positron and electrons) gives us 2 gamma rays. I.e ^{0}_{-1}e+ ^{0}_{+1}e \rightarrow 2 \gamma In my textbook says: Now my question, what is law of preservation of impulse?? Why e is written like ^{0}_{-1}e instead of e^-^1 or something??
  50. B

    Impulse and Momentum Problem

    A grenade of mass 10 kg explodes into three pieces in the same plane, two of which, A (5.0 kg) and B (2.0 kg), move off as shown. Calculate the velocity of the 3.0 kg third piece, C. I cannot show all of my work becuz it is basically just a sketch of what the diagram would look like, then...
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