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A bat strikes a $0.145-\mathrm{kg}$ baseball. Just before impact, the ball is traveling horizontally to the right at 50.0 $\mathrm{m} / \mathrm{s}$ , and it leaves the bat traveling to the left at an angle of $30^{\circ}$ above horizontal with a speed of 65.0 $\mathrm{m} / \mathrm{s}$ . If the ball and bat are in contact for 1.75 $\mathrm{ms}$ , find the horizontal and vertical components of the average force on the ball.

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(a) $4.71 \mathrm{kg} \cdot \mathrm{m} / \mathrm{s}$(b) $2690 \mathrm{N}$

Physics 101 Mechanics

Chapter 8

Momentum, Impulse, and Collisions

Moment, Impulse, and Collisions

University of Michigan - Ann Arbor

Simon Fraser University

Hope College

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.

04:58

A bat strikes a 0.145 -kg …

16:12

A bat strikes a 0.145-kg b…

04:14

05:33

A bat strikes a 0.145 kg b…

06:40

A bat strikes a $0.145 \ma…

04:22

A $0.30 \mathrm{~kg}$ soft…

0:00

A baseball approaches home…

05:15

04:53

Force of a Baseball Swing.…

03:20

A batter swings at a baseb…

03:25

08:42

A 0.145 -kg baseball pitch…

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