Question

A ball of mass 50g is moving with speed of 30m/s.it comes into rest in 10s . 1.Calculate change in momentum 2. Rate of change in momentum
3.force acting on object
4. Distance travelled before it comes into rest .​

Answer 1

Explanation:

Mass of the ball is m

b

=50gm=0.05Kg

Initial velocity of ball u

b

=100m/s

Final velocity is v

b

=0m/s

(1) Initial momentum of ball p

i

=m

b

u

b

=5Kgm/s

(2) Final momentum of ball p

f

=m

b

v

b

=0.05×0=0

(3) Retardation occurred by the wooden block is

v

2

−u

2

=2as

−(100)

2

=2a(0.02)

a=−250000m/s

2

(4) Resistive force

F=ma

=0.05×−250000

=12500N