Question

4. The momentum of particle is numerically
equal to its K.E. What is the velocity of the
particle? *
(1 Point
9 ms
2 ms-1
1 ms
3 ms​

Answer 1

Answer : 2ms-¹

Explanation:

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