Question

a body of mass 25 gram has a movement of 0.40 kg m/s. find its kinetic energy

Answer 1

Hii There!!!!

Since,
Momentum = mass × velocity

0.4 = 0.025 × v

=>v= 0.4/0.025

=> v = 16 m/s

Now Kinetic Energy ,

KE = 1/2 m v^2

= 1/2 × 0.025 × 16 × 16

=> 3.2 J


Therefore, Kinetic Energy is 3.2 Joules.



Hope it helps

Answer 2

solution:

Mass = 25 gram = 0.025 kg

momentum = 0.4 kg m/s

p = MV

0.4 = 0.025 v

v = 16 m/s

now, Kinetic energy= 1/2 mv^2

1/2 ×0.025×256

= 3.2 joule

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Amrit