Suppose you are standing at the edge of Cliffs of Moher in Ireland. You throw a

Question

Suppose you are standing at the edge of Cliffs of Moher in Ireland. You throw a camera (object a) straight up and another camera (object b) straight down simultaneously at the same initial speed. The motion of the tow objects is a free-fall motion and you may neglect air resistance. A) What is the velocity of object A at the highest point of its trajectory? B). What is the acceleration of object A at the highest point of its trajectory? C). Is there any difference of acceleration vector between ascent and descent of object A? Why? D). What is the speed of object A as it reaches you on the way down? Velocity? E). What can you conclude about the speed of both objects as they hit the ocean? F). How long does it take both objects to reach the ocean?

Explanation / Answer

A) at highest point velocity is zero.

B) Acceleration of A at highest point is 9.8 m/s^2 (gravitational acceleration)

c) No because in free fall motion, only gravity is acting on the object.

D) It will be the same as initial speed.

E) Both will have same velocity.

F) object A will take twice the time of object B to reach the ocean.

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