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A $5.00-8$ bullet is fired borizontally into a 1.20 $\mathrm{kg}$ wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.20 . The bullet remains embedded in the block, which is observed to slide 0.230 $\mathrm{m}$ m along the surface before stopping. What was the initial speed of the bullet?

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$\overrightarrow{\mathrm{v}}_{b 1}=229 \mathrm{m} / \mathrm{s}$

Physics 101 Mechanics

Chapter 8

Momentum, Impulse, and Collisions

Moment, Impulse, and Collisions

Cornell University

University of Michigan - Ann Arbor

Simon Fraser University

University of Winnipeg

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.

18:50

A 5.00-g bullet is fired h…

03:28

A 5.00 g bullet is fired h…

05:17

04:56

A 5.00 -g bullet is fired …

02:54

A 8.00 g bullet is fired h…

05:27

A 5.00gbullet is fired hor…

07:28

A $12.0-\mathrm{g}$ bullet…

04:09

. A $\mathrm{A} 5.00$ g bu…

03:54

A 0.020-kg bullet is shot …

04:22

06:07

A 4.00-g bullet, traveling…

01:42

A $60-\mathrm{g}$ bullet i…

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