Question

the kinetic energy of a 0.5kg stone is 100J the momentum of the stone is

Answer 1

Answer:

Given : h=40 m m=2kg u=0m/s

Force due to air resistance f=20N

Acceleration of the stone a=g−

m

f

=10−

2

20

=0 m/s

2

Using v

2

−u

2

=2aS

∴ v

2

−0=2(0)×40 ⟹v=0m/s