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An ice hockey forward with mass $70.0 \mathrm{~kg}$ is skating due north with a speed of $5.5 \mathrm{~m} / \mathrm{s}$. As the forward approaches the net for a slap shot, a defensive player (muss $110 \mathrm{~kg}$ ) skates toward him in order to apply a body-check. The defensive player is traveling south at $4.0 \mathrm{~m} / \mathrm{s}$ just before they collide. If the two players become intertwined and move together after they collide, in what direction and at what speed do they move after the collision? Friction between the two players and the ice can be neglected.

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Physics 101 Mechanics

Chapter 8

Momentum, Impulse, and Collisions

Moment, Impulse, and Collisions

University of Michigan - Ann Arbor

University of Washington

Simon Fraser University

Hope College

Lectures

04:30

In classical mechanics, impulse is the integral of a force, F, over the time interval, t, for which it acts. In the case of a constant force, the resulting change in momentum is equal to the force itself, and the impulse is the change in momentum divided by the time during which the force acts. Impulse applied to an object produces an equivalent force to that of the object's mass multiplied by its velocity. In an inertial reference frame, an object that has no net force on it will continue at a constant velocity forever. In classical mechanics, the change in an object's motion, due to a force applied, is called its acceleration. The SI unit of measure for impulse is the newton second.

03:30

In physics, impulse is the integral of a force, F, over the time interval, t, for which it acts. Given a force, F, applied for a time, t, the resulting change in momentum, p, is equal to the impulse, I. Impulse applied to a mass, m, is also equal to the change in the object's kinetic energy, T, as a result of the force acting on it.

02:04

Two hockey players are abo…

03:20

A 70.0-kg ice hockey goali…

04:10

A 70.0 -kg ice hockey goal…

02:55

Two $72.0-\mathrm{kg}$ hoc…

07:36

A $91.0-$ kg hockey player…

05:03

Two hockey players collide…

06:02

Two skaters collide and gr…

02:23

Ice skaters collide While …

04:04

03:08

04:59

Two 78.5 -kg hockey player…

02:32

05:10

ssm $\mathrm{A} 50.0$ -kg …

Hello students In this problem, we have given the highest hockey ice hockey forward with mass. 70 kg is getting due north. First of all, we know that this is north to south east and this is west. Yeah, His previous 5.5 m per second in north direction and Mass is also given 70 kg right And it was also given that defensive player has masked 110 kg mhm 110 kg mass and moving with 4 m per second in the direction of south. Just before that collides police and night. So after the collision, if the two players become intervened and moved together after the equal, I'd in right direction in what direction they will move. So, first of all, we know that here momentum will be conserved. Initial momentum should we call the final momentum. Initial momentum is 5.5 into 70 5.5 into 70 minus 110 in 24 will be equal to final. Memento will be 70 plus 110 total mask in two weeks. So this we will be called 17 to 5.5 minus 440 divided by 1 80. This is the final speed after the college and now we will solve this. This will be equal to 17 to 5.5, minus 4. 40. The very, very even 80. This is minus 0.31 m per second. Now this negative sign implies that I consider south direction is negative and not direction is positive. So this will be speed after collision 0.31 m. Second deal south and that's it. Thank you.

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