A body of mass 5 kg is moving with a momentum of 10 kg m s -1 . Now a force of 2 N acts on the body in the direction of its motion for 5 s. The increase in the Kinetic energy of the body is____J.
Text Solution
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(30)
The formula to calculate the change on momentum of the object is given by
p f -p i = 
...
Substitute the values of the known parameters into equation and solve to calculate the final momentum of the object.
p f - 10 kg m s -1 = 2 N x 5 s
p f =(10 + 10) kg ms -1
= 20 kg m s -1 The formula to calculate increase in kinetic energy 
of the particle is given by
…
Substitute the values of the known parameters into equation to calculate the required increase in kinetic energy.
=30J
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