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a rock is released from rest on a 700 m building. (a) How long does it take to hit the ground? (b) what is velocity of the ball just before it hits the ground?​

Sagot :

Answer:

The final velocity of the rock is  −44.3  m-s, and its fall time is   4.52 s.

Explanation:

There are at least two ways to solve this, one being with kinematics and the other with a combination of kinematics and energy conservation. These are just the first two that come to mind.

Hope that helps!