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1. A rifle is fired horizontally over a large flat plane. At the instant the rifle is fired, a student drops a second identical bullet from the same height as the rifle. Which bullet hits the ground first?

2. A monkey is hanging from a tree branch. A scientist wants to shoot the monkey with a tranquilizer dart so she can study the monkey. She knows the monkey will be startled by the sound of the tranquilizer gun and will let go of the branch at the instant the gun is fired. Where should the scientist aim to hit the monkey? (Above it, below it or directly at it?)

3. a golfer hits a golf ball an initial velocity of 54m/s [42 degrees above the horizontal]. the ball lands on an elevated green that is 14m higher that the level from which the golfer hit the ball.

a) how far away horizontally from the golfer does the ball land?

b) what is the velocity of the ball when it lands?

please show all the steps

Sagot :

AL2006id

1).  An object launched horizontally hits the ground in exactly the same time
as if it had just been dropped from the same height.

2). The scientist should aim the dart below the monkey.  By the time the dart
gets there, the monkey will have dropped some distance toward the ground.


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