Question

Kinetic energy , If the inc increase ai 12%, then increase in momentom will be. body is the a) 0.22 b) 0.44 c)0.1 d) 1​

Answer 1

If the increase in the kinetic energy of a body is 22 %, then the increase in the momentum will be

Medium

Solution

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Correct option is

C

10 %

It is known that P=mv and E=

2

1

mv

2

P=

2mE

. If m is constant then

P

1

P

2

=

E

1

E

2

=

E

1.22E

⇒

P

1

P

2

=

1.22

=1.1

⇒P

2

=1.1P

1

⇒P

2

=P

1

+0.1P

1

=P

1

+10 % of P

1

So the momentum will increase by 10%