Question

A girl of mass 30 kg jumps on a cart of mass 5 kg with a velocity of It0 m/s.Find the velocity with which she and cart start moving ater she jumps on it

Answer 1

applying conservation of linear momentum we get,

(30kg)*(10m/s)=((30+5)kg)*(velocity req.)

therefore,

req. velocity = 300/35= 8.57m/s