Impulse Definition and 940 Threads

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...

I am trying to find the impulse response h[n] of a LSI system: y[n]+ay[n-1]=bx[n]-cx[n-1]. The way that I think to solve this problem is compute the z-transform, and from this H(z)=Y(z)/X(z). Then take the inverse z-transform to find h[n]. Is there another way to compute this? Also, for H(z)...

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...

hii! Has discussed impuls. That the speed shipped ring becomes bigger when a force is permitted seem for an extended period of time. We thought however that it became little complicated when one a compared object that is hard with one that is geleaktigt, i e very formable. It feels as that...

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...

Homework Statement To make a bounce pass, a player throws a 0.60 kg basketball towards the floor. the ball hits the floor with a speed of 5.4m/s at an angle of 65o to the vertical. The ball rebounds elastically with the same speed and angle. Calculate impulse (magnitude and direction) delivered...

Homework Statement A rubber ball (mass 0.26 kg) is dropped from a height of 1.7 m onto the floor. Just after bouncing from the floor, the ball has a speed of 3.6 m/s. (a) What is the magnitude and direction of the impulse imparted by the floor to the ball? Magnitude ? kg · m/s (b) If...

Homework Statement A 2.00X10^2 kg(200kg) shot is discarded horizontally from a cannon of mass 2.0x10^4kg(20000), with a speed of 250 m/s relative to ground. Find steady force which, acting on the cannon, will stop its recoil in 2.0s and How far will cannon recoil Homework Equations...

Homework Statement To basketball player bounces the 0.60-kg basketball to another player by bouncing it off the court. The ball hits the court with a speed of 6.5 m/s at an angle of 50° from the vertical. If the ball rebounds with the same speed and angle, what was the impulse delivered to...

Homework Statement mass of steel ball = 40g = .04 kg h1 = 2.00 m h2 = 1.60 m A steel ball is dropped from height of 2.00 m onto horizontal steel slab, rebounds to height of 1.60m. Calculate impulse of ball during impact. Homework Equations impulse J = F*dt J = P2 - P1 I tried...

I can't seem to master this equation, because I think I'm doing things right and I'm not. Homework Statement When a 410 baseball gram is hit, its velocity changes from +28.87 m/s to -22.34 m/s. The baseball is in contact with the bat for 56.10 milliseconds. You may assume that the balls...

Show that the kinetic energy of an object can be written in terms of the momentum as KE = p^2/2m. Homework Equations KE = 1/2MV^2 The Attempt at a Solution To be honest, I don't know where to even start with this problem. It equals PV/2 but I still need to find a way to derive p^2/2m

I messed up on the title of the thread.. I had a few questions but ended up solving them on my own. The only question I have is how to solve this ODE. Thanks. Homework Statement Solve the ODE (dx/dt)= f(t) - .1x Where f(t) = 2+sin(t)2. The attempt at a solution I faintly remember doing...

Homework Statement A baseball player hits a baseball (m = 0.145 kg) as shown in the figure below. The ball is initially traveling horizontally with speed of 35 m/s. The batter hits a fly ball as shown, with a speed vf = 51 m/s. What is the magnitude and direction of the impulse imparted on the...

Homework Statement A 231.0 g ball is dropped from a height of 2.60 m, bounces on a hard floor, and rebounds to a height of 1.37 m. The impulse received from the floor is shown below. What maximum force does the floor exert on the ball if it is exerted for 2.00 ms? Homework Equations Jx =...

Hi, I have a question regarding on how to determine the impulse response of an LTI system which has the following conditions: 1).its input is x(n) = u(n) and output is y(n) = (1/2)nu(n) ,and 2).x(-1) = -1/3; x(0) = 1; x(1) = 1/2, and x(n) = 0 for all other values of n My approach: I...

Homework Statement A paratrooper fell 375 m from an airplane without being able to open his chute. Assume that his speed at impact was 52 m/s (terminal speed), that his mass (including gear) was 85 kg, and that the force on him from the snow was at the survivable limit of 1.2 multiplied by...

Homework Statement A paratrooper fell 375 m from an airplane without being able to open his chute. Assume that his speed at impact was 52 m/s (terminal speed), that his mass (including gear) was 85 kg, and that the force on him from the snow was at the survivable limit of 1.2 multiplied by...

Homework Statement An 8-g bullet is shot into a 4.0-kg block, at rest on a frictionless horizontal surface. The bullet remains lodged in the block. The block moves into a spring and compresses it by 3.0 cm. The force constant of the spring is 1500 N/m. Find the initial speed of the bullet...

Homework Statement Calculate the impulse (in kg m/s) received by a football when it is kicked in a kickoff. The ball has a mass of 0.259 kg and travels a horizontal distance of 46 m. The ball is kicked at an angle of 47 degrees with the horizontal...

1. Find the impulse response h(t) given: z'(t) + 4z(t) = 4x(t) 2. The attempt at a solution I first decided to divide through by 4 (1/4)z'(t) + z(t) = x(t) since we are looking for impulse response I made the following substitutions: let z(t) = h(t) let x(t) = dirac(t)...

Hello very body i got confused understanding how we can get the derivative of V(t) equal to Hv(t) : V= (1/R) e^(-t/RC) U(t) its derivative V' = Hv(t) = -(1/R²C)e^(-T/RC) U(t) +(1/R)&(t) where : U(t) is the unite step fonction and &(t) is the delta fonction please some help thanks for...

Homework Statement A playerbounces a basketball on the ground. If the ground exerts a force F = 10N on the ball in 0.1 seconds, what is the impulse on the basketball. If the ball is simply dropped from a height of 2m, assuming the impulse to be the same as before, what is the basketball's...

Homework Statement In the figure , what value of F_max gives an impulse of 6.8 Ns? http://img76.imageshack.us/img76/1782/09ex05.jpg Homework Equations Integral of F with respect to time equals impulse The Attempt at a Solution I tried doing two things, and they were both wrong...