Chapter 3, Problem 4CQ

### College Physics

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

Chapter
Section

### College Physics

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

# A ball is projected horizontally from the top of a building. One second later, another ball is projected horizontally from the same point with the same velocity, (a) At what point in the motion will the balls be closest to each other? (b) Will the first ball always be traveling faster than the second? (c) What will be the time difference between them when the balls hit the ground? (d) Can the horizontal projection velocity of the second ball be changed so that the balls arrive at the ground at the same time?

(a)

To determine
The point in the horizontal projectile motion where the balls are closest to each other.

Explanation

When a body is thrown horizontally from a height, the motion followed by the body is called the horizontal projectile motion. For a projectile motion, the horizontal velocity is independent of the vertical velocity. The body has zero acceleration in the horizontal direction and the acc...

(b)

To determine
If the first ball will always be travelling faster than the second.

(c)

To determine
The time difference between the balls when they hit the ground.

(d)

To determine
If the horizontal projection velocity of the second ball will be changed so that the balls arrive at the ground at the same time.

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