Question

A ball of mass 10g is initially moving with a velocity of 50m /sec on applying a constant force on ball for 2sec, it acquires a velocity of 70 m/sec. Calculate the rate of change of momentum.?

Answer 1

f=ma
m=10g
u =50m/s
v=70m/s
t=2s
a=v-u/t
a=70-50/2
a=20/2
a=10m/s^2
f=ma
f=10×10
f=100N

Answer 2

collect the photographs of local famous musicians and exhibit them in your class room