A ball of mass 2 kg is released from a
height of 180 m and falls freely to the ground. Assuming that the value of g
is 10 m/s², the time taken by the ball to reach the ground is
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Explanation:
Potential energy = mgh
8*10*10
=800
Therefore, potential energy lost = kinetic energy gained
Kinetics energy = 1/2mv^2
800=1/2*8*v^2
1600/8=v^2
200=v^2
V=14.14m/s
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