Question

What is the kinetic energy of a body of mass 2kg and momentum 2 ns?

Answer 1

Hello !

Momentum = mass x velocity
mass = 2 kg
momentum = 2 N/s

Velocity = momentum/mass
             = 2/2
             = 1 m/s

Kinetic energy = 1/2 mv²
                        = 1/2 × 2 × 1²
                        = 1 Joule 


Kinetic energy  of the body = 1 J

Answer 2

Answer:

1 J

Explanation:

momentum=2 ms

mass=2kg

momentum=m×v

therefore v=momentum/m

=2/2 = 1m/s

k.E= 1/2 mv²

= 1/2 × 2×1²

= 1J