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You are standing on a concrete slab that in turn is resting on a frozen lake. Assume there is no friction between the slab and the ice. The slab has a weight five times your weight. If you begin walking forward at 2.00 $\mathrm{m} / \mathrm{s}$ relative to the ice, with what speed, relative to the ice, does the slab move?

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$=-0.400 \mathrm{m} / \mathrm{s}$ in the opposite direction of your motion

Physics 101 Mechanics

Chapter 8

Momentum, Impulse, and Collisions

Moment, Impulse, and Collisions

Rutgers, The State University of New Jersey

Simon Fraser University

University of Sheffield

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.

01:03

Stuck in the middle of a f…

00:45

A 45.0 -kg girl is standin…

00:42

A sled of mass $5.0 \mathr…

A hockey puck slides with …

03:46

You are standing on a larg…

08:22

An $8.00 \mathrm{~kg}$ blo…

An 8.00-kg block of ice, r…

03:21

A $45.0$ -kg girl is stand…

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