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Physics

Assertion (A) : Momentum of a body is the product of mass and acceleration.

Reason (R) : The rate of change of momentum of a body is equal to the product of mass and acceleration.

  1. both A and R are true and R is the correct explanation of A
  2. both A and R are true and R is not the correct explanation of A
  3. assertion is false but reason is true
  4. assertion is true but reason is false

Motion in One Dimension

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Answer

assertion is false but reason is true

Explanation

Assertion (A) is false because momentum (p) is defined as :

p=mv(mass × velocity)\text p=\text {mv}\text {(mass × velocity)}

​Reason (R) is true because acccording to Newton’s second law :

F=ΔpΔt=ma (if mass is constant)\text F=\dfrac {Δ\text p}{Δ\text t}=\text {ma (if mass is constant)}

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