Question

a boy of mass 50kg is running with a velocity of 10km/hr. how much force is required to bring the boy to rest in 2min

Answer 1

Answer:

1.9

Explanation:

Formula M

1

u

1

+m

2

u

2

=(M+m)v

2

M=50kg,u

1

=2m/s,m=2kg,u

2

=0

After jumping on to cart both man and cart move with common velocity.

So, by substituting values we get,

50(2)+2(0)=(50+2)v

2

100+0=52v

2

v

2

=100/52=1.9

Answer 2

Answer:

Force=150000N is the correct answer