A cart on a frictionless track is attached to a horizontal spring

PHYSICS · Single correct · CBSE · Physics · Oscillations · Oscillations

Problem

A cart on a frictionless track is attached to a horizontal spring. The spring constant is

2.5\,\text{N}\!\cdot\!\text{cm}^{-1}

. The cart is pulled

20\,\text{cm}

in the

-x

direction (to the left) and released but held momentarily at rest. What is the

x

-component of the spring force acting on the cart while it is held? (a)

+0.50\,\text{N}

(b)

+5.0\,\text{N}

(c)

+50\,\text{N}

(d)

-50\,\text{N}