Question

A man and a cart move towards each other. The
man weighs 64kg and the cart 32kg. The velocity
of the man is 5.4 km/hr and that of the cart is
1.8 km/hr. When the man approaches the cart,
he jumps on to it. The velocity of the cart carrying
the man will be
1) 3 km/hr
2) 30 km/hr
31 1.8 km/hr
4) zero
​

Answer 1

Answer:

Solution :m1u1+m2u2=(m1+m2)v

=>(64×5.4)+(32×1.8)=(64+32)v

=>v=3 km/hr