Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground?

a. 13.6 m/sec

b. 1.39 m/sec

c. 185 m/sec

d. 9.80 m/sec

option A

Explanation:

given,                                              

height of the drop of stone = 9.44 m

speed of the stone = ?                          

As the stone is dropped the energy of the stone will be conserved.

using conservation of energy.            

Potential energy = Kinetic energy    

            v = 13.60 m/s                      

Hence, the correct answer is option A

think about the oscillation of the toy shown in the video. when the toy is at the highest point of its motion, its velocity is zero and its acceleration is negative.

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