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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

A pitcher claims he can throw a 0.145-kg baseball with as much momentum as a 3.00-kg bullet moving with a speed of 1.50 × 103 m/s (a) What must the baseball’s speed be if the pitcher’s claim is valid? (b) Which has greater kinetic energy, the ball or the bullet?

(a)

To determine
The speed of baseball when the base ball has as much momentum as the bullet.

Explanation

Given info:

The mass of bullet is 3.00g .

The mass of baseball is 0.145kg .

The velocity of the bullet is 1.50×103m/s .

The momentum of the ball and the bullet are same.

The Formula to calculate the momentum is,

pbullet=pballmbulletvbullet=mballvball

  • pbullet is the momentum of the bullet
  • pball is the momentum of the baseball
  • mbullet is the mass of the bullet
  • mball is the mass of the baseball
  • vbullet is the speed of the bullet
  • vball is the speed of the baseball

Rearranging the equation gives the speed of baseball as,

vball=mbulletvbulletmball

Substitute 1

(b)

To determine
The object with greater kinetic energy.

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