Impulse Definition and 905 Threads

if an impulse of 25 N~s results, how would one describe the change in momentum? how is that number related or indicative of the change in momentum? i could be way off. that's likely. thanks.

a good bunter pulls the bat back right as contact is made with the ball. Why is this so? 1 This action decreases the impulse of the bat on the ball 2 This action increases the impulse of the bat on the ball 3 This action increases the average force of the bat on the ball 4 This action...

Jumping onto sand vs. jumping into water results in which of the following as each substance brings you to a halt? a) The sand exerts a greater impulse than the water b) The water exerts a greater impulse than the sand c) The sand and water exert the same impulse, but the sand exerts a...

A 500 g cart is released from rest 1.0 m from the bottom of a frictionless, 30 degree ramp. The cart rolls down the ramp and bounces off a rubber block at the bottom. The figure shows the force during the collision. Here's what I did. Which is probably wrong for the very first part so...

Question: A 500 g cart is released from rest 1.0 m from the bottom of a frictionless, 30 degrees ramp. The cart rolls down the ramp and bounces off a rubber block at the bottom. During collision, the cart and the ramp are in contact for 0.0267 sec. The average force exerted by the ramp on the...

A baseball has mass 0.145 kg. A. If the velocity of a pitched ball has a magnitude of 45.0 m/s and the battered ball's velocity is 55.0 m/s in the opposite direction, find the magnitude of the change in momentum of the ball. delta p = m*delta v = m*(v2 -v1) = .145 kg (-55.0 m/s - 45.0...

Hi, I'm kinda lost on these 2 problems. A space probe is traveling in outer space with a momentum that has a magnitude of 7.15 x 107 kg·m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 1.81 x 106 N and a direction opposite to the...

HELP! Impulse Response h(t) problem Please help me solve this problem. Atleast the correct answer indication is also very much appreciated. Compute the impulse response h(t) for (dy(t))/dt -4y(t)=x(t) a. y(t) = e^4t b. y(t) = 1- e^4t c. y(t) = e^-4t d. y(t) = 1- e^-4t Compute the impulse...

A 0.14 kg baseball moves toward home plate with a velocity vi = (-37 m/s) x. After striking the bat, the ball moves vertically upward with a velocity vf = (13 m/s) y. 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...

Hello, I've been reviewing some material from my undergraduate studies. In the book "Signals and Systems" by Haykin in the first chapter he gives an example of a voltage source with the value of Vo*delta(t) applied to a series RLC circuit. Vo is some arbitrary constant and delta(t) is the...

A 300 g ball with a speed v of 6.0 m/s strikes a wall at an angle of 30 degrees, and then rebounds with the same speed and angle. It is in contact with the wall for 10 ms. (a) What is the impulse on the ball from the wall? (b) What is the average force on the wall from the wall? What...

If I'm given an object with X mass that is moving in one direction at Y velocity, then changes direction and moves at Z velocity, how do I calculate the impulse? Most equations I have are concerned with time intervals; this one is not.

Hey. I am having a little trouble understanding the concept of impulse. The textbook i am using doesn't really shed much light onto the topic. I know that impulse is equal to the change in momentum of an object, or the product of a force applied to an object and the time it is applied for...

Hey, This may seem as stupid query for you people out there, but I would like to know if somebody would be able to spare a moment or two in explaining to me what the terms: momentum impulse power mean/refer to in the study of kinematics. Thank you heaps for your kindness, time and effort...

This thread would've fitted in a lot of categories, but as it's the mathematics I can't quite grasp, I decided to fit it here. I'll be treating the discrete case, so I suppose it's precalculus maths. Anyways, I know how to compute problems with the impulse response method, but I'm kinda baffled...

can someone help? I have no isea how to do this problem. A force in the negative direction of an x-axis is applied for 21 ms to a 0.40 kg ball initially moving at 10 m/s in the positive direction of the axis. The force varies in magnitude, and the impulse has magnitude 32.4 Ns. (a) What is...

Problem: An upright rod of mass m and length L is given an impulse J at its base, 45 degrees above the horizontal, which sends the rod flying. What value should J have for the rod to land vertically again (i.e. upright on the same end at which J was applied)? I'm trying to learn from Feynman's...

I've come across the following problem: Two otherwise isolated, equal masses m are at rest and connected by a spring with constant k. An impulse is applied to one of the masses along the direction of the spring connecting them. What happens? Qualitatively, I think that the force will both...

A 56g steel ball is released from rest and falls vertically onto a steel plate. The ball strikes the plate and is in contact with it for .5 ms. The ball rebounds elastically, and returns to its original height. The time interval for a round trip is 8.00 s. In this situation, the average force...

Hi everyone, I am stuck on two fairly easy questions that I hope someone will be able to help me with. Questions: 1) How much angular impulse must be supplied by the hamstrings to bring a leg swinging at 8 rad/s to a stop, given that the leg's moment of inertia is 0.7 kg-m^2 ? my...

How do you go about taking the Laplace transform of something like... \delta (t-1)sin(t) What does this even mean?

Ok, in this problem I am getting bogged down in the basic algebra part of it. I had one person explain it once but I still missed something.:frown: a 1055-kg van, stopped at a traffic light, is hit directly in the rear by a 715-kg car traveling with a velocity of +2.26 m/s. Assume that the...

6. Two particles, each of mass m, are connected by a light inextensible string of length 2l. Initially they lie on a smooth horizontal table at points A and B distant l apart. The particle at A is projected across the table with velocity u. Find the speed with which the second particle begins to...

Cognitive superiors, I am trying to calculate the maximum torque that a flywheel of a given angular momentum can output when "instantaneously" ( I think this is my problem ) connected to another flywheel. From what I can see it seems that as the time taken to couple the flywheel to the...

A 230N force causes a 4.0kg to accelerate from 5.0m/s North to 3.0m/s east. for how much time does hte force act? t = m(vf-vi) / F i got this but the trouble is vf and vi are in different directions...and since t is not a vector i can't break it down to components. what should i do?

Impulse Matching In regards to finding the unit impulse response of a system. We assume that x(t) = \delta (t) and that the intials conditions at t=0^_ are all zero. The impulse response h(t) therefore must consists of the systems's modes for when t \geq 0^+. But why is it that h(t) = A...

okay I am not sure what the right answer is out of these multiple choices because I am not sure how exactly to use F delta T. A 4.0-N force acts for 3.0 sec on an object. The force suddenly increases to 15 N and acts for one more second. What impulse was imparted by these forces to the...

In terms of impulse and momentum... In terms of impulse and momentum... why are padded dashboards safer in automobiles? why are nylon ropes, which stretch considerably under stress, favored by moutain climbers? why is it preferred that railroad cars be loosely coupled with slack...

can someone show me how to find the impulse response h(t)? questions: Determine the impulse response h(t) for the system characterized by the differential equation y(2)(t) + 2 y(1)(t) + 17 y(t) = x(2)(t) + 5 x(1)(t) + 18 x(t) thanks

Hey, These questions are in my textbook and seeing that I have an exam coming up any help with these problems would be greatly appreciated. 1) A space shuttle is located in 'deep space', where the effects of gravity can be neglected. It has a mass of 120 Mg, a centre of mass at G, and a...

Another question, this time I'm dead stuck: I don't really understand the question nor the concepts implied. Can anyone give me an explanation and directions to the right equations? My physics textbook doesn't seem to have any information on the subject (or maybe it does in a different...

Hey, I've been looking on this problem: "You have two cars with equal mass and speed (50km/h), which crash head on. One driver is wearing a seat belt (situation 1), the other not (situation 2). Calculate the force and impulse on each of the drivers during the collision. You can assume that...

Here is a link to an image of my problem: http://img54.imageshack.us/img54/7268/prob31iq.jpg For part (a), I said that the impulse is the area under the graph and that is equal to Mv (since the initial velocity is zero): J=\int\limits_{0}^{0.4}F\,dt=.36\implies v=.072\text{m}/\text{s} Part...

hi, I am trying to solve this problem. A tennis ball of mass m=0.060kg and speed v= 25m/s strikes a wall at a 45 degree angle and rebounds with the same speed at 45 degree. What is the impulse given to the ball? Do i need to break velocity into its components. Please suggest me a...

Hey everyone, I'm having trouble on a homework problem and hopefully someone can help me. A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 58.0 m/s and returns the shot with the ball traveling horizontally at 38.0 m/s in the opposite direction. (Assume the...

How would I go about this problem? Any advice would be really helpful, please. A bat strikes a 0.154 kg baseball. Just before the impact, the ball is traveling horizontally to the right at 50m/s, and it leaves the bat traveling to the left at an angle of 30 degrees about the horizontal with a...

Ok, I've done work on this problem, but I think that everything I try is wrong. I can't get any help from my book or my teacher because he made it up and wants up to try it. But I have no clue how to start. Please help me :cry: A basketball (m = 0.57 kg) is dropped from rest. Just before...

I'm getting very close, but not quite close enough on this problem: A baseball is struck by a bat such that it makes an angle of 41 degrees form the direction between the batter and the pitcher. The pitch was thrown at 37.995 m/s. The ball was hit with a speed of 6.258 m/s. What was the...

Impulse 1) A gold ball of mass 0.045 kg is hit off the tee at a speed of 45 m/s. The golf club was in contact with the ball for 3.5 x 10^-3 s. Find (a) the impulse imparted to the golf ball and (b) The average force exerted on the ball by the golf club. Answer: (a) 2.0 kg(m/s) (b) 15.8 x 10^2...

The force shown in the force-time diagram acts on a 538 g object. Find the final velocity of the object if it is initially at rest. Answer in m/s. I correctly found the impulse by determining the area underneath the curve. It's 7 N s. I know that we can determine the final velocity by...

I found this to be the hardest question on my last test: A 5kg block is resting on two tables such that the middle isn't resting on a part of a table. A 10g bullet is fired at 1000m/s from directly below the block perpendicular. The bullet exits the block going 400m/s. What was the maximum...

I have a ball that is dropped from from rest at a height of 1.2 meters it hits the ground and bounces to a height of 0.7 meters. The mass of the ball is 0.5kg. I am assuming that initial velocity is 0 because it is released from rest. I need to find the magnitude of direction of the impulse of...

Recent studies have raised concern about `heading' in youth soccer (i.e., hitting the ball with the head). A soccer player `heads' a size 3 ball deflecting it by 54.0°, and keeps its speed of 10.30 m/s constant. A size 3 ball has a mass of approximately 2.000 kg. What is the magnitude of the...

A bungee jumper (m = 75.00 kg) tied to a 48.00 m cord, leaps off a 78.00 m tall bridge. He falls to 8.00 m above the water before the bungee cord pulls him back up. What size impulse is exerted on the bungee jumper while the cord stretches? I found the velocity by v_final^2= V_inital + 2ad...

Hi, Please can I have some help with this problem: A machine gun in automatic mode fires 20g bullets with vbullet=300m/s at 60 bullets/second. a- If the bullets enters a thick wooden wall, what is the average force exerted against the wall? b- If the bullets hit a steel wall and rebound...

Hi, I would like to have some help the following problem If a 32 g arrow moving at 160km/h penetrates a block of wood suspended by a rope, what is the impulse is delivered to the block? The impulse= momentumfinal-momentuminitial. We know that momentuminitial= 0.32 kg* 44.44m/s=14,28 N. But...

I read on Wikipedia: Is myelinated interneurons redundant? If not, why? What's being done about getting this stuff into human brains? How is this myelin different? - Wah! mk.

we have two concepts 1)if force is applied for a distance x(i.e work) it increases the kinetic energy of a mass 2)if force is applied for a time t(i.e impulse) it increases the momentum of the mass why there are two concepts. Are the above two same?

I was wondering how do you go about converting something like tri(t-1) to the unit impulse function. How do you convert any function to a unit impulse function? More specifically I'm trying to find the Laplace transform of x(t)=[tri(t-1)]e^(-3t) And I was told you have to convert the...

How do we know the direction of the impulse(which is the change in momentum)? I thought let's say if an object travels at -ve x direction at a certain speed and someone hits it back at another speed (towards the +ve x direction), how do we tell the direction of the impulse? Isnt the direction...