Question

A handball player hits the ball with a mass of 0.25 kg. The ball travels at a velocity of 15 m/s for .75 s until it hits the wall.

What is the average acceleration of the handball

A. 20m/s^2
B 0.05m/s
C, 20m/s
D.0.05m/s^2

Answer 1

Treating this as a straight-line motion problem, the following formula can be used to solve for acceleration:

Vf = Vi + at

Where: Vf = final velocity = 0 m/s
Vi = initial velocity = 15 m/s
a = acceleration = ?
t = time = 0.75 s

Substituting the given values:

0 m/s = 15 m/s + a * 0.75 s

|a| = -15 / 0.75
a = 20 m/s^2

Therefore, the answer is A.