Impulse Definition and 905 Threads

If you know the mass of an object and the speed of its motion, how do you calculate how large the impulse is when it is caught or stopped?

I just need a little help getting past the first step. I have already converted rpm to rad/sec. 120 J are done on a fly wheel to raise its speed from 60rpm to 160 rpm. Find its moment of inertia. How do I convert 120J to power and how do I set up the inertia half

any website?

If I decrease vf, will I deliver greater impulse?

A croquet mallete delievers an impulse of 8.83 N*s to a .44 kg croquet ball initally at rest. what is the speed of the ball immediately after being struck? ok so I = Ft = change in momentum and they give us just a mass... so that would help with p = mv to find velocity... but this...

Okay, So... I'm having trouble understanding what I did wrong here. I can't seem to understand how I got this problem wrong. Here's the problem statement: A 0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t=0 the puck is moving to the right at 2.98 m/s. a.)...

I have some trouble wrapping my head around singularity One of assignment question is to show that the unit function is not defined at 0. To do that, I need to show \lim_{\Delta\to0}[u_{\Delta}(t)\delta(t)]=0 \lim_{\Delta\to0}[u_{\Delta}(t)\delta_{\Delta}(t)]=\frac{1}{2}\delta(t)...

I don't know whether I got this right, but something seems strange about my answers. Teacher didnt help much :( A satellite of mass 2.40 x 10^2 kg moving in free space at a velocity of 6.00 x 10^3 ms^-1 is struck by an unknown object that causes it to be deflected onto a new path at right...

Impulse and momentum... really stuck... please help! Consider a collision between two spheres where we have both elastic force and dissipative force. Let x is a variable where it is let to be the sum of their radii when they are just touching, and that distance decreasing during the...

Problem: A 20-g bullet is fired into a 4-kg block and becomes embeded in it. knowing that the bullet and block then move up the incline for 1.2 seconds before coming to a stop Determine; (a) the Magnitude Of the bullets initial velocity, (b) the Magnitude of the Impulsive force by the bullet...

so i have a question about work and impulse: The diagram shows an overhead view of two pucks on a frictionless air track. Puck 1 has a mass of 8 kg and puck 2 has a mass of 10.3 kg. The pucks begin at rest at the starting line. The pucks are pushed across the table by equal forces as a...

I have an easy question about Impulse J: Is it safer in a car crash to have a bigger impulse or a smaller impulse?

I have three questions that I'm having a hard time with. Any help would be greatly appreciated... easiest one first: 1. A 3kg ball of putty moving at 1m/s collides and sticks to a 2kg ball at rest. The putty and the ball then move with a momentum of what? so far i have initial momentum...

A baseball player hits a 82 mph fastball, sending it back at 120 mph. The ball has a mass of 150 g. The contact time is 0.001 s. What is the average force on the bat? Okay, so I converted the miles to kilometres, and then used the equation F_avg*(t_2-t_1) = m_1*v_2 - m_2*-v_2, but I can't get...

hey, Consider the initial value problem: y''+(gamma)y'+y=k(delta)(t-1), y(0)=0, y'(0)=0 where k is the magnitude of an impulse at t = 1 adn (gamma) is the damping coefficietnt(for resistence). Let (gamma)=1/2. find the value of k for which the response has a peak value of 2; call this...

I'm doing problems where I have f(t) (force as a function of time) graphs and f(x) (force as function of distance) graphs. I am just having one problem, how do I find work for a force as a function of time graph? Im not sure how work relates at all to force as a function of time. I know...

Recent studies have raised concern about `heading' in youth soccer (i.e., hitting the ball with the head). A soccer player `heads' a size 4 ball, deflecting it by 52.0°, and keeps its speed of 10.00 m/s constant. A size 4 ball has a mass of approximately 0.302 kg. What is the magnitude of the...

Impulse help! A 0.09 kg tennis ball with a speed of 43.2 m/s strikes the ground at a 45.4 degree angle and rebounds with the same speed and the same angle (see the figure below). What is the magnitude of the impulse given to the ball by the ground? Does anyone have any clue?? I sure don't.

Hi there, i need to know if my approch to this question is right Particles A, B and C , each of mass m, lie at rest in a straight line in the order stated. A is projected directly towards B with velocity u. The coefficient of restitution is 0.5 in each impact that follows. Show that there...

Impulse and Momentum problem! HELP! Joe Varsity kicks a football of mass 1 kg. As his foot makes contact with the ball, it exerts a force which gradually increases to a maximum value over milliseconds, then falls immediately to zero, as shown in the graph above. The force is given by the...

A 64.9 g ball moving to the right at 11.1 m/s is struck by a bat causing it to move to the left with a speed of [y] m/s. If the bat and ball are in contact for 0.01683 s, what is the average force in N exerted by the ball on the bat? Ok for this question I am getting -42.8, but that's wrong...

This problem is driving me crazy! I'm currently taking AP physics and my teacher gets confused with her own problems, anyways I want to see if anyone could give me a hand on this impulse problem. Here is a link to the problem: http://img101.exs.cx/img101/9262/lastscan.jpg Thank you guys

A 0.2kg ball is thrown at 15m/s, 45 degrees below the horizontal. The ball is hit by at bat at 40m/s, 30 degrees above the horizontal. What is the impulse delivered to the ball? So, impulse is change in momentum. The initial momentum is .2*15=3Ns How would I find the final momentum and how...

10) A 5 kg ball sits motionless at the edge of a 2m long 1.2m tall table. A cube of mass 0.5kg plows into it head-on at a speed of 26m/s There is a graph below in the attachments about the collision. a) Determine the total impulse given to the ball. b) Determine the velocity of the...

Hey I am in 12 grade but this is advanced placement so its college level... Anyways i could use some help on this problem i have A 5kg ball initally rest at the edfe of a 2-meter long, 1.2 meter high frictionless tavle, as show above. A hard plastic cude of mass .5kg slides across the table...

Hi, Am wondering how to calculate the thrust and impulse thrust for gas escaping a pressure bottle - ie a scuba tank or the like. My maths is a lil shady so go easy on integration and such. Like say if I wanted 1MJ of energy output - what size bottle at what pressure with what nozzle...

hi guys I am a college junior...taking physics for the first time in my life...its fun...but still tuff...just can i get help with these couple questions..i mean it would be very gracious of any of u to help me out...i know I am new and all, but this place...i was just browsing around and it...

Can anyone assist, I have tried various formulas on both problems with no luck. Thanks for any assistance or feedback. 1) A student (m = 59 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.020 s. The average force...

Q. While thinking about your physics homework, you drop one of your mom's dinner plates on the floor breaking it into three pieces. The second piece has a mass of 2 times the first piece and flys off perpendicular to it. These first two pieces both have a speed of 2.6 m/sec. The third piece...

Hey I've been having trouble with this impulse problem, in fact I don't even seem to know where to start. My prof didn't even cover any impulse problems in class and then expects us to do one for homework. :rolleyes: But anyways, any help would be appreciated, I'm sure there's someone who can...

A .14 kg baseball moves toward home plate with a velocity vi=-36 m/s x. After striking the bat moves vertically upward with a velocity vf= 18 m/s y. (a) Find the direction and magnitude of the impulse delivered to the ball by the bat. Assume that the ball and bat are in contact for 1.5ms. (b)...

I am presently taking my first course in signals and systems and I have been charged with proving the scaling property of the impulse function; that: delta(a(t-to)) = 1/abs(a)*delta(t-to) I am seriously miffed and need some help.

Could someone explain to me the mathematical differences between impulse, intensity, and inertia? I mean, they all start with I's, but I still cannot determine any mathematical precision instead variation among these three.

ok, i get this question that says: "An object of mass 3.0 kg is moving in the neg. x direction with a speed of 2 m/s. it is acted upon by a force with an impulse of 24 N s. What is the final momentum and the final velocity after that impulse has acted on the object? so i did P(initial) = mv...

This question kinda stumped me :frown: ... Suppose that a ball of mass 0.25 Kg is moving downward at a speed of 15 m/s when it lands in your hand. (a) If it takes .15 s to bring it to rest in your hand, what is the net impulse your hand exerts on the ball to bring it to rest? Give both size...

hey all... really struggling with how to attack this question: On September 12, 1966, a Gemini spacecraft piloted by astronauts Conrad and Gordon met and docked with an orbiting Agena launch vehicle. With plenty of fuel left in the spacecraft , NASA decided to determine the mass of the...

According to what I've read, the reason we has safetly belts in cars is because "the collision is made longer, therefore force is decreased according to the impulse equation" and hammers are made of metal because "this is hard and makes collisions short, therefore force is large". Is it really...

A 0.15 kg ball traveling horizontally at 6.0 m/s is hit by a bat, after which it is traveling at 8.0 m/s perpendicular to the original direction. I'm supposed to determine the impulse that the ball receives from the bat. Since cos90 is zero, would this just be the mass multiplied by the...

Hi- I have a quiz tomorrow on Newton's 1st and 2nd Laws. I'm kind of iffy with the second law, especially when it comes to impulse and impact. What is impact, and how can you measure impulse? For example, what if an object is dropped onto a soft couch, etc, etc.. basic theories... i haven't yet...

I am trying to calculate the height that a rocket engine will fly, by deriving the equation Gravitational potential energy(gPe)=FXH, where F is the weight of the engine and h is the vertical distance. The gPe at the rockets highest point must equal the chemical potential energy that the engine...

hey, i did my undergrad in music and english and now am lost beyond reckoning with the impulse response stuff in my postgrad. Could anyone help with these exercises? They're examples from my lecture notes and have no idea how my lecturer got the answers. Please help? Ex.1) Show that x(t)*h(t)...

hey, i did my undergrad in music and english and now am lost beyond reckoning with the impulse response stuff in my postgrad. Could anyone help with these exercises? They're examples from my lecture notes and have no idea how my lecturer got the answers. Please help? Ex.1) Show that x(t)*h(t)...

hey, i did my undergrad in music and english and now am lost beyond reckoning with the impulse response stuff in my postgrad. Could anyone help with these exercises? They're examples from my lecture notes and have no idea how my lecturer got the answers. Please help? Ex.1) Show that...

God i hate this damned topic >.< Q. Two particles P and Q have speeds of 6m/s and 0m/s respectively. P directly collides with Q, the colision is perfectly elastic. a) find the speed of Q directly after impact b) find the impulse on Q a) so far i have worked out that using the law of...

What is the physical meaning of the specific impulse?. All i know is what I've read in rocket informations. Its dimensions are s^(-1), and appear as one of the principal variables in rocket engines. Thanks.

Hi! I'm a sixteen year old grade eleven physics student,and I'm having trouble understanding impulse and momentum.I would like you to clear up a few things for me. "suppose two identical cars traveling at the same speed are brought to a stop: one by its braks, the other by a concrete...

Question: The 40 kg slider block is moving to the right with a speed of 1.5 m/s when it is acted upon by the forces F1 and F2. If these loadings vary as shown (in the attachment called graph), determine the speed of the block at t =6s. Neglect friction and the mass of the pulleys and cords...

Question (I added a picture): The free-rolling ramp has a mass of 40 kg. A 10 kg crate is released from rest at A and slides down 3.5 m to point B. If the surface of the ramp is smooth, determine the ramp's speed when the crate reaches B. Also, what is the velocity of the crate? This is...

Physics class is starting to sound like advertisements for toiletries: Men, try "Momentum!" Ladies, wear "Impulse" or "Joules," enriched with pheremones! Ha ha Having trouble with this problem, about a bungee jumper jumping off a cliff for 5 seconds total, in free fall for 3 seconds, then...

Is it enough to know the momentums of the balls (and the angle) to determine what force they exert on each other when they collide? I know F delta t = m delta v but how can I know the time? Please help.