Question

If the momentum of a body is numerically equal to its K.E then speed of body is

Answer 1

Answer:

Correct option is

D

2 ms

−1

Let, m be the mass of the body and v be the velocity of the body.

Now, momentum of the body is

p=mv

Kinetic energy is

E=

2

1

mv

2

As per given condition

2

1

mv

2

=mv=x(say)

2

1

mv

2

=x

2m

1

m

2

v

2

=x

2m

1

x

2

=x

x=2m

Now,

mv=2m

v=2 ms

−1

Answer 2

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