NEET2010PhysicsWork, Power and EnergyActual
Assertion : If momentum of a body increases by 50 % , its kinetic energy will increase by 125 % . Reason : Kinetic energy is proportional to square of velocity.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion
- BIf both assertion and reason are true but reason is not the correct explanation of assertion
- CIf assertion is true but reason is false
- DIf both assertion and reason are false.
Correct answer
A. If both assertion and reason are true and reason is the correct explanation of assertion
Step-by-step solution
As, p₂=p₁+50 % of p₁=(3 / 2) p₁ v₂=(3 / 2) v₁ As, kinetic energy, K v^2 K₂= 9 4 K₁ Increase in K . E .= (K₂-K₁ ) 100 K₁ =125 % .