A horizontal force on a block is increased very slowly from zero
PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
A horizontal force on a block is increased very slowly from zero. Which statement best explains why the block initially remains at rest?
(a) Static friction is zero until motion begins; only kinetic friction counters the applied push.
(b) The horizontal force increases the normal reaction, producing enough friction to hold the block.
(c) Static friction adjusts itself up to a limiting value equal to the applied force, keeping the block at rest.
(d) Static friction remains at its maximum value μsN even for very small applied forces, balancing the push.