1. Two balls are dropped at the same time from different heights. As they accelerate toward the ground, the distance between them will:

• A. increase.
• B. decrease.
• C. remain constant.

2. A cannonball is fired toward a vertical building 400 m away with an initial velocity of 100m/s at 36.9 above the horizontal. The ball will hit the building in

. A. less than 4.0 s.

• B. 4.0 s.
• C. 5.0 s.
• D. more than 5.0 s.

If the cannonball in the previous question is fired horizontally from a 150-m-high cliff, but still 400 m from the building, then the ball will hit the building in

A. more than 5.0 s.

• B. 4.0 s.
• C. less than 4.0 s.
• D. 5.0 s.