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2. A ball is thrown straight upward from the window of a building 40 meters above...

2. A ball is thrown straight upward from the window of a building 40 meters above the ground with an initial velocity of 20 m/s. Calculate

a. The speed of the ball after 1.5 sec.

b. The time needed for ball to reach its maximum height.

c. The maximum height.

d. The time needed for the ball to return back to the same window which was thrown

e. The time needed for the ball to reach the ground.

f. Final velocity of the ball just before it reaches the ground.

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