JEE Main Physics question
A marble and a cube have the same mass, starting from rest; the marble rolls without slipping while the cube slides (frictionlessly) down the same ramp, which has just enough friction at the marble's contact point to sustain rolling but offers negligible resistance to the sliding cube. When they arrive at the bottom, the ratio of the speed of the cube to the centre-of-mass speed of the marble is
Answer: (A)
Solution
The cube slides without friction, so all its lost PE converts to translational KE: . The marble rolls without slipping, so its KE is shared between translation
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