   Chapter 2, Problem 64AP

Chapter
Section
Textbook Problem

A player holds two baseballs a height h above the ground. He throws one ball vertically upward at speed v0 and the other vertically downward at the same speed. Calculate (a) the speed of each ball as it hits the ground and (b) the difference between their times of flight.

(a)

To determine
The final speed of each ball.

Explanation

Given Info: The initial velocity of the ball is v0 , the acceleration of the balls g and the displacement of the balls is h .

Explanation:

The formula used to calculate the final velocity of each ball is,

v=vi2+2aΔy

Here,

Δy is the displacement of the ball

v is the final velocity of the ball

vi is the initial velocity of the ball

a is the acceleration

Substitute v0 for vi , g for a and h for Δy to find v

(b)

To determine
The difference between the times of flights of the ball.

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