A table tennis ball has radius m and mass kg. It is slowly pushed down into a swimming pool to a depth of m below the water surface and then released from rest. It emerges from the water surface at speed , without getting wet, and rises up to a height . Which of the following option(s) is(are) correct?
[Given: , m s, density of water kg m, viscosity of water Pa·s.]
[Given: , m s, density of water kg m, viscosity of water Pa·s.]
- A.The work done in pushing the ball to the depth is 0.077 J.
- B.If we neglect the viscous force in water, then the speed m/s.
- C.If we neglect the viscous force in water, then the height m.
- D.The ratio of the magnitudes of the net force excluding the viscous force to the maximum viscous force in water is 500/9.
Show answer
Correct options: A, B, D
[JEE Advanced 2024 · Paper 2]