Question

Find the momentum of a body of mass 100g having kinetic energy 20J

Answer 1

Answer:

Mass, m = 100g = 0.1kg

Kinetic energy = (1/2)*mv^2 = 20J

mv^2 = 40

v^2= 40/0.1= 400

v = 20 m/s

Momentum = mv

= 0.1 * 20

= 2 kg m/s

Or

KE = P^2/ (2m)

P^2= 2m* KE= 2*0.1*20=4

P= 2 kg m/s

Explanation:

hope it will be help you

Answer 2

Answer:

K.E= 1/2(mv2)

m = 100g = 1kg

K.E=20J

so, 20=1/2×0.1xv2

40=0.1xv2

400= V2

v=20m/s

Momentum, p=mv

So, p=0.1kg×20m/s

=2kgm/s

Explanation:

i hope you find your answer..