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Q.

A body of mass 2 kg is thrown up with a speed of 25 m/s. Find its maximum potential energy.


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a

0 J

b

125 J

c

25 J

d

625 J 

answer is D.

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Detailed Solution

A body of mass 2 kg is thrown up with a speed of 25 m/s. Its maximum potential energy will be 625 J.
Mass, m=2 kg
Initial velocity, u=25 m/s
Final velocity, v=0 m/s g=-9.8 m/s2
As per energy conservation law, All the kinetic energy will be converted into potential energy at the highest point. So,
Maximum potential energy = Initial kinetic energy
= 12mv2
= 0.5 × 2 kg×252 m/s
= 625 J.
 
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