Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Body ‘P’ having mass M moving with speed ‘u’ has head – on collision elastically with another body ‘Q’ having mass ‘m’ initially at rest. If m << M, Body ‘Q’ will have a maximum speed equal to ‘2u’ after collision.

Reason R : During elastic collision, the momentum and kinetic energy are both conserved. In the light of the above statements, choose the most appropriate answer from the options given below

Option 1 -

A is correct but R is not correct.

Option 2 -

A is not correct but R is correct.

Option 3 -

Both A and R are correct and R is the correct explanation of A.

Option 4 -

Both A and R correct but R is NOT the correct explanation of A.

1 View | Posted a month ago

Asked by Shiksha User

1 Answer

Answered by

Payal Gupta | Contributor-Level 10

a month ago

Correct Option - 3

Detailed Solution:

Mass m will acquire velocity 2u. Total momentum of system will be conserved but total kinetic energy is not conserved during collision.

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