Question

a ball of mass 100 g moving with a velocity of wm/s is stopped by a boy in0. 25 sec find the force is applied by boy to stop the ball​

Answer 1

u=10  m/s

v=−10  m/s

mass m=0.25kg

time t=0.01s

from v=u+at⟹20=at⟹a=  

from v=u+at⟹20=at⟹a= 20/t = 20/0.01 = 2000m/s^2

from F=ma⟹F=0.25×2000=500N