An object of mas 40 kg is raised to a height of 5m above the ground.if the object is allowed to fall, find its kinetic energy when it is half-way down (g=10 m/s²)
(a) 2000 J
(b) 1000J
(c) 200J
(d) 100J
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Answer:
1000J
Explanation: a height of 5 meter object has a potential energy of 2000 J. When this object is allowed to fall and it is Half way down its height above the ground will be half of 5 m= 5/2= 2.5m. Potential Energy at Half way down= 1000 joules.
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