Question

2. Your phone slips from your pocket as you’re going up a ladder of a high building. Your phone falls for 2.7 seconds before you heart it hit the cement below. include your solution.

a. At what height did the phone fall from? (Hint: Your phone’s initial velocity is zero.)

b. What was the velocity of your phone when it hit the cement?

Answer 1

a. The initial height is

$$h=\frac{gt^2}{2}=26.5\text{ m}.$$

b. The velocity is

$$v=\sqrt{2gh}=22.8\text{ m/s}.$$