Question

why did the salt shaker stop moving?
a the salt shaker ran out of force.
b the table exerts a force that is opposite to the salt shaker’s motion.
c the table absorbs force from the salt shaker.
d all objects stop moving because their natural state is to be still.

Explanation:

When an object like a salt - shaker moves on a surface like a table, it experiences friction. Friction is a force that opposes the motion of an object. Option a is incorrect as force is not something an object "runs out of" in this context. Option c is not correct as tables do not absorb force in the way described. Option d is wrong because an object's natural state is not always to be still (Newton's first law: an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an external force). The table exerts a frictional force opposite to the salt - shaker's motion, causing it to stop.

Answer:

b. The table exerts a force that is opposite to the salt shaker’s motion.