Impulse Definition and 935 Threads

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...

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]...

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...

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...

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??

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...

I have this exercise of many i have to do but this is the hardest of them and i don't get it much. While a car is stopped at a traffic light in a storm, raindrops strike the roof of the car. The area of the roof is 5.0 m^2. Each raindrop has a mass of 3.7 x 10^-4 Kg and speed of 2.5 m/s...

[SOLVED] collision and impulse Homework Statement A 1.0 kg ball drops vertically onto a floor, hitting with a speed of 20 m/s. It rebounds with an initial speed of 5 m/s. (a) What impulse acts on the ball during the contact? kg·m/s (b) If the ball is in contact with the floor for...

1. A car moving along a straight road starts to decrease its speed linearly with distance travelled, such that its speed drops from 50 m/s to a value which would approach zero after 100 m. What distance will have been traveled when the car`s acceleration is -10m/s^2 /. Answer is 60m , but how...

Homework Statement Given the transfer function of a linear, time-invariant system H(z)=\frac{z^2+5z}{z^2+5} compute the impulse response. Homework Equations We are supposed to compute the inverse z-transform with partial fraction decomposition but the problem here is the irreducible...

Homework Statement a 250 g ball with a speed v of 6.6 m/s strikes a wall at an angle θ (the angle between the wall and the path of motion) of 30° and then rebounds with the same speed and angle. It is in contact with the wall for 6 ms. What is the impulse on the ball from the wall...

Homework Statement A 20 g cricket (Acheta domestica) leaps through a 2.2 m horizontal distance. The initial velocity of the cricket makes a 28° angle with the horizontal direction. If it takes the cricket 0.010 s to leave the ground, what is the magnitude of the impulse of the total force on...

Homework Statement what value of Fmax gives an impulse of 5.6 N\s? Picture of graph below http://session.masteringphysics.com/problemAsset/1070437/6/09.EX05.jpg Homework Equations Jx=Integral from t initial to t final of Fx(t)dt ^px=Jx The Attempt at a Solution I started...

Homework Statement A bullet of mass 0.03kg is fired from a gun with a horizontal velocity of 400 ms^-1. Find the momentum of the bullet after it is fired. If the gun is then brought to rest in 1.2s by a horizontal force which rises uniformly from zero to B N and then falls uniformly to...

Hello, I am (obviously) new to the forum. I am in an introductory-level physics course in university and although I had taken a year of physics in high school, these easy intro questions on my homework keep snagging me. This is online homework and I get 5 attempts at the correct solutions...

I attempted the qn .. but I'm not sure if this is the correct way of going about it.. the relevant equations used weren't given. Homework Statement Force and Impulse: The magnitude of an unbalanced force on a 10 kg object increases at a constant rate from 0N to 50N in 4.0s, causing the...

[SOLVED] Impulse of deflected ball 1. Recent studies have raised concern about `heading' in youth soccer (i.e., hitting the ball with the head). A soccer player `heads' a 0.421 kg ball, deflecting it by 50.0 degrees, and keeps its speed of 10.40m/s constant. (The deflection angle is the angle...

1. What is the basic SI unites for momentum and impulse? 2. Know whether impulse and momentum are vector or scalar quantities. 3. What does it mean for a system to be isolated? 4. Differentiate between external and internal forces. 5. Differentiate between elastic and inelastic collisions...

i was doing some research on future methods of space flight when i noticed something called a reactionless drive . impulse if you will. http://jnaudin.free.fr/html/impdexp.htm i was wondering if what the info says has been confirmed and if so how it works .

Hey guys, this is my first post and I'm looking for a bit of help This is going to sound really easy (and I know it is) but I can't for the life of me remember how to work out the Impulse Response Function of this system. I've tried google for a few hours but nowhere that gives it in laymans...

Homework Statement Hail stones of mass 0.0650 kg are falling straight down with a speed of 15 m/s when they strike a car roof. If the hailstones bounce to a height of 12 cm above the car, what is the impulse that the car roof imparts to a single hailstone? Homework Equations p=mv J=Ft...

"Back of envelope calculations" for thurst, specific impulse, etc. I am working on a project that is really out of my realm of experience, so if you could give me some basics, that would be much appreciated. How do you determine the amount of thrust, power, etc. needed to travel a distance of...

Homework Statement A 20g cricket leaps through a 2.55 m horizontal distance. The initial velocity of the cricket makes an angle of 30 degress with the horizontal direction. If it takes the cricket 0.019s to leave the ground, what is the magnitude of the impulse of the total force on the...

Hey. Just wondering if I could get a little help with this quest please. A flywheel has a moment of inertia of 854kgm^s, and is allowed to come to rest from and angular velocity of 450rpm. Knowing that kinetic friction produces a resisting moment of magnitude 14Nm, determine the time required...

Two particles A & B of masses 3 kg and 4kgr connected by a string and lie at rest on a smooth horizontal table with string taut. B is struck wid a blow directly away from A so that there is an impulse of 8Ns transmited along the string. Find speedd with which A begins to move. ans is 3/8

Homework Statement A 0.47 kg soccer ball approaches a player horizontally with a velocity of 18 m/s to the north. The player strikes the ball and causes it to move in the opposite direction with a velocity of 24 m/s. What impulse was delivered to the ball by the player? Answer in kg*m/s...

Homework Statement A bird is initially perched on a swing with a mass of 153 g. The bird has a mass of 52 g. The swing is 8 cm below the point of attachment to the top of the cage. The bird/swing are initially at rest. The bird takes off horizontally at 2 m/s. How high will the base of the...

A 75 kg man is sitting in his car at rest at the stoplight. He is rear-ended by another car and is accelerated to 3.0 m/s in 0.2s. What is the impulse on the man and his car? I found the impuse on the man which was: I = m(change v) = 75(3.0 -0) = 225 Ns I found the Net force on the...

[SOLVED] Calculate Average Force by finding Impulse over Impact Time Homework Statement A movie depicting a 55-g golf ball hit with a club shows that the impulse time between the club and the ball is 0.2 ms, and the initial speed of the ball is 136 mph. a) What is the average force exerted...

Homework Statement In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 60 m/s (terminal speed), that his mass (including gear) was 80 kg, and that the...

i don't understand wat I am doing wrong here is my problem Choose the positive direction to be from the pitcher to the plate (some answers may be negative). A pitcher throws a 0.13 kg baseball so that it crosses home plate horizontally with a speed of 31 m/s. It is hit straight back at the...

[SOLVED] Impulse and depth********! Homework Statement In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 58 m/s (terminal speed), that his mass...

[SOLVED] IMPULSE, i need HELP! Homework Statement Until he was in his seventies, Henri LaMothe excited audiences by belly-flopping from a height of 11 m into 30 cm. of water (Figure 9-49). Assuming that he stops just as he reaches the bottom of the water and estimating his mass to be 76 kg...

A 30kg child moving at 4m/s jump onto a 50kg sled that is initially at rest on a long frictionless,horizontal. a) find the speed after the child jumps onto the sled b)find Kinetic Energy of the child after the child jumps onto the sled After coasting at constant speed for a short time, the...

A miniature spring-loaded, radio-controlled gun is mounted on an air puck. The gun's bullet has a mass of 5.00 g, and the gun and puck have a combined mass of 120 g. With the system initially at rest, the radio controlled trigger releases the bullet causing the puck and empty gun to move with a...

A 100g puck is revolving in a 20-cm-radius circle on a frictionless table. The string passes through a hole in the center of the table and is tied to two 200g weights. Suppose a flame burns through the string and causes the lower weight to fall off while the puck is revolving. What will be...

Homework Statement An object of mass 3.0 kg is projected into the air at a 45° angle. It hits the ground 3.7 s later. What is its change in momentum while it is in the air? Ignore air resistance. _____ kg·m/s downward Homework Equations F\DeltaT = \DeltaP =...

Homework Statement A block of mass 200g is suspended through a vertical spring.The spring is stretched by 1cm when the block is in equilibrium.A particle of mass 120g is dropped on the block from a height of 45cm.The particle sticks to the block after the impact.Find the max extension of the...

Homework Statement A billiard ball going 4 m/s collides with a stationary ball of equal size cause the second ball to move at an angle of 35 degrees at speed of 2.5 m/s --mass=.3 kg What impulse (magnitude and direction) did second ball receive? What about the first ball? What is the final...

A ball of mass 7.0 g with a speed of 25.2 m/s strikes a wall at an angle 23.0 ° and then rebounds with the same speed and angle. It is in contact with the wall for 39.0 ms. What is the magnitude of the impulse associated with the collision force? What is the average force exerted by the ball...

Why is more impulse delivered during a collision when bouncing occurs than during one when it doesn't?

The magnitude of the net force exerted in the x direction on a 3.15 kg particle varies in time as shown in the figure below. There is a graph that is supposed to be here. The y-axis is F(N) and the x-axis is t(s) It starts from the orgin then goes to point (2,4), then to (3,4), then ends at...

The magnitude of the net force exerted in the x direction on a 3.15 kg particle varies in time as shown in the figure below. There is a graph that is supposed to be here. The y-axis is F(N) and the x-axis is t(s) It starts from the orgin then goes to point (2,4), then to (3,4), then ends...

Homework Statement A 700 g air-track glider collides with a spring at one end of the track. The figure shows the glider's velocity and the force exerted on the glider by the spring. How long is the glider in contact with the spring? Homework Equations F(t_1-t_2)=mv_2-mv_1 The Attempt at...

Impulse help! emergency.(3 problems) Alright, so I have these problems due tomorrow, and I was out the other day so I do not understand it. If someone can tell me how to set each up, then I can probably work it out. Equations impulse= Force*\DeltaTime Force*\DeltaTime=mass*\Deltavelocity...

Okay, I was absent the day we did impulse at school, so now I'm confused as to how to do some of it. I just need to know how to set up the problems, I know that impulse=F\Deltat and that F\Deltat=m\Deltav...but I don't know where to go after that. The first problem: Two children, totaling...

Homework Statement A golf ball with a mass of 43.80 g can be blasted from rest to a speed of 64.60 m/s during impact with a club head. Assume that the impact lasts only about 0.980 ms. Calculate the change in momentum of the ball. Homework Equations P = mv Change in P = Pf - Pi J =...

Homework Statement A ball of mass m moving with velocity v_{i} strikes a vertical wall. The angle between the ball's initial velocity vector and the wall is \theta_{i} as shown on the diagram, which depicts the situation as seen from above. The duration of the collision between the ball and...

Homework Statement Mass of both end, distance from the pin point, height of the plug and its mass, angular velocity are given. Need to fine angular velocity w of the arm immediately after plug has wedged itself in the block. Homework Equations (Ho)o = (Ho)horizontal The Attempt at...

hi... a basic question... [ ppl are having heated arguments over this at home ] " when u jump out of a moving bus... u run a little distance" why we do this? what is this phenomenon?