Question 1: A basketball player can jump to a height of 1.1 m off the ground. so he can easily dunk a basketball.

Part A

For such a leap, what is his "hang time" - the time spent in the air after leaving the ground and before touching down again? Express your answer to two significant figures and include the appropriate units.

Question 2:

A rock climber stands on top of a 57 m-high cliff overhanging a pool of water He throws two stones vertically downward 1.0 s apart and observes that they cause a single splash. The initial speed of the first stone was 2.1 m/s .

Part A

How long after the release of the first stone does the second stone hit the water? Express your answer to two significant figures and include the appropriate units.

Part B

What was the initial speed of the second stone?

Express your answer to two significant figures and include the appropriate units.

Part C

What is the speed of the first stone as it hits the water?

Express your answer to two significant figures and include the appropriate units.

Part D

What is the speed of the second stone as it hits the water?

Express your answer to two significant figures and include the appropriate units.