JEE Main Physics question
A spring-pong (table-tennis) ball of mass is floating in air, held up by a jet of water emerging out of a nozzle. If the water strikes the ping-pong ball with a speed and falls dead (stops) just after collision, the rate of flow of water in the nozzle is equal to
Answer: (C)
Solution
For the ball to float, the upward force from the water jet must balance gravity: . This force equals the rate of momentum delivered
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account