Question

if the velocity of the body becomes two-fifth of initial, then find the ratio of new kinetic energy to old kinetic energy​

Answer 1

Explanation:

ANSWER

KE=

2

1

mv

2

If V becomes V

′

=3V

KE

′

=

2

1

m(3V)

2

=

2

9

mV

2

=9KE

Answer 2

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Explanation:

Answer

KE=

2

1

mv

2

If V becomes V

′

=3V

KE

′

=

2

1

m(3V)

2

=

2

9

mV

2

=9KE

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