Freefall example

You throw a ball straight up. It leaves your hand at 12.0 m/s.

(a) How high does it go?

(b) If you catch the ball at the same height where you let go, how long was it in flight?

(c) How fast is it traveling when you catch it?

While the ball is in free fall, which of the following describes the ball's acceleration? The ball's acceleration is (neglect air resistance):

  1. Directed down on the way up, zero at the top, and directed up on the way down
  2. Decreasing in magnitude on the way up, and increasing in magnitude on the way down
  3. Constant the entire time
  4. Constant the entire time except at the very top when it is momentarily equal to zero

Origin = height at which it leaves your hand

Positive direction = up

yo 0
vo 12 m/s
a -9.8 m/s2