Assertion: A block of mass starts moving on a rough horizontal surface with velocity
PHYSICS · Subjective · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics
Problem
Assertion: A block of mass m starts moving on a rough horizontal surface with velocity v. It stops due to friction between the block and the surface after moving through a certain distance. The surface is now tilted at an angle of 30∘ to the horizontal, and the same block is made to move up the surface with the same initial velocity v. The decrease in mechanical energy in the second situation is smaller than that in the first situation.
Reason: The coefficient of friction between the block and the surface decreases with an increase in the angle of inclination.