Question Detail
Question
A pitcher requires about 0.2 second to throw a baseball. If the ball leaves his hand with a speed of 80 m/s, how large is its acceleration?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Assuming constant acceleration, a = Δv / Δt = (80 - 0) / 0.2 = 400 m/s². So 400 m/square second.
Hint
Acceleration is change in velocity divided by time.