Impulse Definition and 905 Threads

Hello, I was just wondering if an Impulse was exerted by one body on another if they collided but remained in total contact post-collision. The reason I ask is because my little I=F(delta)t indicates that there should be a change in time to calculate an impulse but in this case the 2 bodies...

Homework Statement A 0.5 kg object drops from rest from a 3m high point. On bouncing from Earth it rises to a height of 2m. The collision with Earth lasts for about 10^-4 seconds. i) What is the impulse received by the object? ii)Considering that there is a gravitational force present, Can you...

Homework Statement A bag of sand with mass=55 is dropped from h=30 ft Velocity at impact with Earth is 43.8ft/sec The impact time ( time for sand bag to come to rest) is 1/10 sec. What is the impulse force on the sand bag in this inelastic collision ?Homework Equations Impulse force = change in...

When a ball of mass 180 g is struck by a bat moving in the opposite direction, the force acting on the ball is as shown in the graph (Figure 8.37). Determine The final velocity of the ball if it was initially moving at 10.0 m s–1 south. The graph depicted the Impulse as 10Ns (I checked the...

Hi there, For my Final Year Project at University I am analysing Road Restraint Systems/Safety Barriers in a Finite Element Analysis package. My problem is calculating the force exerted onto the barrier by a vehicle during a collision, more specifically the time over which this impact...

Homework Statement In a performance test two cars take the same time to accelerate from rest up to the same speed. Car A has a mass of 1400 kg, and car B has a a mass of 1900 kg. During the rest, which car: a)Has the greatest change in momentum? b)Experiences the greatest impulse? c)Is...

Homework Statement This http://www.alcaweb.org/cgi-bin/WebObjects/ALCA.woa/wa/resource?id=jQ3f23g01p" takes one to the assignment. Students had to determine specific equations based on list and in turn derive a working equation to calculate the total time it took for a bowling ball to come...

Homework Statement In a tropical rainstorm, 40mm of rain fell in one hour. Assuming that the raindrops struck an adequately drained roof normally with an average speed of 10m/s, find the pressure exerted on the roof by the rain. Homework Equations (delta)p = F(delta)t The Attempt...

Homework Statement A bullet of mass 0.04kg is fired horizontally into a wooden block of mass 0.09kg. the wooden block is suspended from the ceiling by a long string. after an impact the bullet is embedded in the block and bullet and the block swing together until the block is 0.10m above its...

I would like to know the difference between pulse response and impulse response. I looked for "pulse" and "impulse" on the internet and found that on some websites they had been used interchangeably. Apart from that I checked out some books and found that they use the term "impulse response"...

When a male bighorn sheep runs head-first into another male, the rate at which its speed drops to zero is dramatic. Figure 9-11 gives a typical graph of the acceleration a versus time t for such a collision, with the acceleration taken as negative to correspond to an initially positive velocity...

1. Homework Statement [/b] Bullet B weighs 0.5 oz and blocks A and C both weigh 3 lb. The coeffient of friction between the block and the plane is \muk = .25. Initially the bullet is moving at v0 and blocks A and B are at rest. After the bullet passes through A it becomes embedded in block C...

Homework Statement You are standing on a large sheet of frictionless ice and are holding a large rock. In order to get off the ice, you throw the rock so it has velocity relative to the Earth of 11.3 m/s at an angle of 34 above the horizontal. Your mass is 67.0 kg and the rock's mass is 14.4...

Homework Statement Compare impulse for the two objects http://www.screencast.com/users/trinhn812/folders/Jing/media/ecf05e80-8fa7-435c-bfa0-891cf13b176a Homework Equations Change in impulse equation The Attempt at a Solution When you calculate impulse do you have to find the...

Homework Statement A(n) 0.182 kg baseball is thrown with a speed of 15.3 m/s. It is hit straight back at the pitcher with a final speed of 10.4 m/s. What is the magnitude of the impulse delivered to the ball? Homework Equations impulse=mass*change of velocity The Attempt at a Solution...

Hi, I am a little bit confused about the impulse response of one electron. Assume that we have LTI system characterized by impulse response h(t) with unit gain, int{h(t)} = 1. Let the input is current i(t) [Amp]. So the output current will be i(t)*h(t). We can view it as i(t) is...

Homework Statement A boy of mass 60.0 kg is rescued from a hotel fire by leaping into a firefighter's net. The window from which he leapt was 8.0 m above the net. The firefighters lower their arms as he lands in the net so that he is brought to a complete stop in a time of 0.40 s. 1.What is...

Homework Statement Soccer player kicks stationary .45-kg ball to a teammate. The balls reaches a max height above ground of 2m at a horizontal distance 5m from the point where it was kicked. The duration of the kick was .04s. Neglecting aero drag, determine the magnitude of the average force...

Homework Statement Two objects are at rest on a frictionless surface. m1 > m2 (1) When a constant force is applied to object 1, it accelerates through a distance d in a straight line. The force is removed from object 1 and is applied to object 2. At the moment when object 2 has accelerated...

Homework Statement A bronze statue of Bhudda was completed in Tohyo in 1993. The statue is 35 m tall and has a mass of 1,000,000 kg. Suppose this statue were to be moved to a different location. What is the magnitude of the impulse that must act on the statue in order for the speed to...

Homework Statement A 0.5-kg rubber ball is dropped from rest a height of 19.6 m above the surface of the Earth. It strikes the sidewalk below and rebounds up to a maximum height of 4.9 m. What is the magnitude of the impulse due to the collision with the sidewalk? Homework Equations...

Homework Statement A pitcher throws a fastball to the catcher. Assuming the speed of the ball does NOT change appreciably in flight a) which player exerts the larger impluse on the ball? why? b) which player exerts the larger force on the ball? why? Homework Equations The...

Homework Statement Hi guys, I tried google for it but no avail so i seek for your help. I have a impulse function x[n] = [1 2 3 4] for n= -4 to 0 The Attempt at a Solution what does the 1 2 3 4 inside the bracket mean? at n = -3, there is a amplitude of 2? Thank you.

Rocio strikes a 0.058kg golf ball with a force of 272N and gives it a velocity of 62.0m/s. How long was Rocio's club in contact with the ball? A force of 186N acts on a 7.3kg bowling ball for .40s. What is the bowling ball's change in momentum? What is its change in velocity...

A 0.300 kg baseball just before and after it collides with a bat. Just before, the ball has a velocity v1 of magnitude 12.0 m/s and angle θ1 = 35°. Just after, it is traveling directly upward with velocity v2 of magnitude 10.0 m/s. The duration of the collision is 1.5 ms. (a) What is the...

Homework Statement A tennis ball of mass m = 0.087 kg and speed v = 43 m/s strikes a wall at a 45° angle and rebounds with the same speed at 45° (Fig. 7-29). What is the impulse given the wall? Homework Equations Impulse = M x V Sin (theta) = opp/hyp The Attempt at a Solution...

Homework Statement A 10 g rubber ball and a 10 g clay ball are thrown at a wall with equal speeds. The rubber ball bounces, the clay ball sticks. Which ball exerts a larger impulse on the wall? Homework Equations J (impulse) = Favg*dt The Attempt at a Solution I think that...

Homework Statement A ball is traveling horizontally over a volleyball net when a player "spikes" it, driving it straight down to the ground. The ball's mass is 0.20 kg, its speed before being hit is 6.4 m/s and its speed immediately after the spike is 21 m/s. What is the magnitude of the...

Homework Statement A steel ball with mass 0.347 kg falls onto a hard floor and bounces. Its speed just before hitting the floor is 23.6 m/s and its speed just after bouncing is 12.7 m/s. (a) What is the magnitude of the impulse of the ball? Homework Equations J=pf-pi The Attempt at...

Here is convolution: c[k]= (0.5)^k * delta(k-1) What do I do about delta(k-1)? I know if it is c[k]= (0.5)^k * delta(k), then it just equal (0.5)^k But what do I do with delta(k-1)?

Homework Statement Two particles of masses 8 kg and 5 kg are connected to the two ends of a light inextensible string which passes over a fixed smooth pulley. Initially each of the two particles are held at a position which is 5 m above a horizontal ground. The objects are then released from...

Homework Statement Question 2: A one-dimensional impulse force acts on a 3.0-kg object, as described by the graph below. Find (a) the magnitude of the impulse given to the object, (b) the magnitude of the average force, and (c) the final speed if the object had an initial speed of 6.0...

I'm a little confused about momentum and impulse. Its not a single problem but just how they relate. For example if a 2kg block moving at 3 m/s hits a 6 kg block, then it will move 1 m/s because momentum is conserved with 6 momentos on either side of the equation. If the impact time is 1...

Homework Statement A 0.10-kg object moving initially with a velocity of 0.20 m/s eastward makes an elastic head-on collision with a 0.15-kg object initially at rest. What is the final velocity of the .10 kg object after the collision ? Homework Equations im not sure which equation to...

1. A mass of 5kg moves horizontally across a smooth surface at 1ms-1. Another mass of 5kg is lowered gently onto the first mass. a) What is the change in velocity of the mass? b) What impulse has been applied to the mass? c) Is this an elastic 'collision'? 2. force x time = change in...

I have a rigid body rotating in 3D space. I have a torque vector that I want to apply to the rotating body over a given time step. What I want to know is, will the torque be enough to stop the body rotating on any of its axis and reverse direction, and, if so, exactly what would the torque...

I read about it but I don't get it. I can understand how current would flow if one side is positive and other negative but I don't understand what is happening in an axon +++++++++++++++++++++++++++++++++ _____________________________________ I don't understand how current is flowing is...

Homework Statement Two identical cars (m = 1350 kg) are traveling at the same speed of 25.0 m/s. They are moving in the directions shown in the drawing. What is the magnitude of the total momentum of the two cars...

Hello everyone, I am currently working on a project where I am trying to find power by being able to measure the force as a function of time within a chain system, similar to a bicycle. If I know the force in the chain and how it varies with time I would be able to determine the impulse the...

Hello! yes is from Sweden and my English is not good, but will try to do as best as possible. My question is: why can not consider the momentum as the acceleration energy? I know that: Impulse is change in momentum which is not the same as energy Impulse can be expressed either as F *...

I have two questions regarding this, any help would be GREAT! 1st Problem: Homework Statement A conveyor belt lifts 1000kg of rocks per minute a vertical distance of 10m. The rocks are at rest at the bottom of the belt and are ejected at 5 m/s. The power supplied to this machine is: A)...

Homework Statement Fourier transform of scaled pulse train from -inf to +inf. Starting at 0 the first impulse is scaled at 2, the second impulse at 1 is scaled as 1, third at three scaled at 2, etc...Homework Equations Does my solution look correct?The Attempt at a Solution X(jw) =...

On a level practice range, a 46 g golf ball is struck by a golf club and leaves teh ground witha speed of 72 m/s at an angle 40 degrees above the horizontal. how much work was done by the golf club on the golf ball? a. 32 J b. 120 J c. 230 J d. 520 J e. 3300 J It's just...

Good day, I have a homework problem I'd like help with. I got into getting the impulse (not sure if correct, though), but don't really know how to get the rest of the things. Any tips on what direction I should be going are appreciated. Homework Statement Starting from rest, 65kg athlete...

Homework Statement In the figure , what value of Fmax gives an impulse of 7.1 Ns Homework Equations The Attempt at a Solution Impulse is the integral of force with respect to time which is the same the area under the force-time graph which is given by the area of the triangle...

Is it true or false that when a baseball player hits a home run, the baseball receives a greater impulse from the bat than the bat does from the ball? I think the answer is false because of the law of conservation of momentum.

Homework Statement A 200 g ball is dropped from a height of 1.9 m, bounces on a hard floor, and rebounds to a height of 1.5 m. The figure shows the impulse received from the floor. What maximum force does the floor exert on the ball? Homework Equations Kinetics: x-xo = vot +...

A player kicks a soccer ball (0.45kg). The player's foot is in contact with the ball for 3.0 H 10^-3 s and the force F(t)=[(6.0 * 10^6)t - (2.0 * 10^9)t^2 ]N for 0<_t<_3.0*10^-3s where t is in seconds. Find the magnitude of (a) the impulse of the ball due to the kick, (b) the...

I have a question about physics in real life. Other than the fact that the area under a force versus time curve is a more accurate way to measure impulse because it's not an average like calculating impulse from a change in velocity is, is there any other reason that the integrated impulse would...

Homework Statement A cart is driving on straight tracks with a velocity of 2 m/s. In the opposite direction, with an angle of 60º according to the tracks, a child with a mass of 2 kg is running with a velocity of 2m/s, he jumps on the cart and stays there. - Find the mass of the cart, if its...