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Two unequal masses are ties together wit...

Two unequal masses are ties together with a cord with a compressed spring in between.
When the cord is burnt with a match releasing the spring, the two masses fly apart with equal

A

(a) Kinetic energy

B

(b) Speed

C

(c) Momentum

D

(d) Acceleration

Text Solution

Verified by Experts

The correct Answer is:
C
As `F_(ext)=0`, according to the law of conservation of momentum,
`vecP_1+vecP_2=const ant`.
but initially both the blocks were at rest, so
`vecP_1+vecP_2=0`, i.e., `vecP_2=-vecP_1`
i.e., at any instant, the two blocks will have momentum equal in magnitude but opposite in direction (through they may have different values of momentum at different positions).
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Knowledge Check

  • Two unequal masses are ties together with a cord with a compressed spring in between. Which one is correct?

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