Question

А body of mass 10gm appears 12gm, when in motion. find its velocity ​

Answer 1

Answer:

Correct option is

C

90

Applying conservation of momentum.

10×20=100×v

v=2 m/s

ΔK.E=

2

1

×10×(20)

2

−

2

1

×100×(2)

2

=2000−200

=1800

% loss =

2

1

×10×400

1800

×100

=

2000

1800

×100=90

Explanation:

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