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Question

two bodies having K.E4J and 9J have equal mass. And their momentum are p1 and p2 respectively then p1/p2

A
4:9
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B
9:4
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C
3:2
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D
2:3
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Solution

The correct option is D 2:3
Momentum for any body = (2×mass×KineticEnergy)1/2
So, for 1stBody

β1=2mkε

So for 2ndBody
p2=2mkε2(2)

divide (1) by (2)

f1p2=kF1k1
KE1=4j and 18ε2=9j
p1b2=23
So Answer is (D).

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