Test SeriesFree PYQsExamsPricing

JEE Main Physics question

PhysicsLaws of MotionJEE Main

The upper half of an inclined plane of inclination θ is perfectly smooth while the lower half is rough. A body starting from the rest at top comes back to rest at the bottom if the coefficient of friction for the lower half is given by [Pb. PMT 2000]

Answer: (D)

Solution

Let the full length be L. On the smooth upper half, v² = 2(g sinθ)(L/2) = gL sinθ. On the rough lower half, the body must lose all this KE plus

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

Question ID VK-153506