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Energy

Two unequal m...

Question

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

A

Both mases will have equal KE.

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B

Lighter block will have greater KE.

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C

Heavier block will have greater KE.

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D

None of above answer is correct

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Solution

The correct option is B Lighter block will have greater KE.
$A s K = \frac{P^{2}}{2 m} a n d | {\to P}_{1} | = | {\to P}_{2} |, h e n c e \frac{K_{1}}{K_{2}} = \frac{m_{2}}{m_{1}} .$
i.e., KE of the two blocks will nto be equal but in the inverse ratio of their masses and so lighter block will have greater KE.

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