Question

A force of 10 N acts on an empty cart of mass 20 kg. How does the acceleration change if the cart is loaded with 20 kg bag, but the force remains the same (a) No change (b) Gets halved (c) Gets doubled (d) None of the above

Answer 1

F=10N,m=20kg,t=10s

a=

m

F

=

20

10

=0.5m/s

2

v=u+at=0+0.5×10=5m/s

Change in momentum =m(v−u)=20(5−0)=100kgm/s