Question

A body of mass 60 kg has a momentum of 3000 kg.m/s , calculate the kinetic energy and speed of the body.

Answer 1

Answer

7.5×10

4

J

K.E=p

2

/2m

p = 3000 kg m/sec and m = 60 kg

This is the relation obtained from two formulae,

p=m×v and K.E=

2

1

×m×v

2

Hence K.E=

2m

p

2

=

2×60

3000

2

J

K.E=75×10

3

J.