A block of mass is attached to two identical light springs of force constant
PHYSICS · Single correct · AP · Physics 1: Algebra-based · Oscillations · Oscillations
Problem
A block of mass m is attached to two identical light springs of force constant k, one on each side, on a horizontal friction-free surface. The springs are fixed to rigid supports at their far ends. If the block is pulled a small distance x to the right of equilibrium and released, the net restoring force on the block at that instant is
(a) 0 (no net force)
(b) kx directed to the left
(c) 2kx directed to the left
(d) 2kx directed to the right