A ball is thrown horizontally with a speed of 10.0 m/s, from the edge of the top

ID: 2257225 • Letter: A

Question

A ball is thrown horizontally with a speed of 10.0 m/s, from the edge of the top of a building

of height 19.6 m, and later strikes the (level) ground. (Neglect air friction.)

1. [5 points] For how long was the ball in the air?

2. [5 points] What is the vertical component of the velocity just before the ball strikes

the ground?

3. [5 points] What is the horizontal component of the velocity just before the ball

strikes the ground?

4. [5 points] How far from the base of the building did the ball strike the ground?

5. [5 points] What is the speed of the ball just before it strikes the ground?

help please !!!!!

a) 2 sec

b) 19.6 m/s

c) same as initially = 10 m/s as there is no horizontal acceleration

d) dis = horizontal vel * time = 20 m

e) (100 + 384.16 )^.5 = 22 m/s

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