JEE Main 2022 Physics question
A man of 60 kg is running on the road and suddenly jumps into a stationary trolly car of mass 120 kg. Then, the trolly car starts moving with velocity 2 . The velocity of the running man was when he jumps into the car.
Answer: 6
Solution
By conservation of momentum, , so v = 360/60 = 6 m/s.