which object is in static equilibrium?\no a rolling ball that has a net force acting on it\no a cruising car…

Answer:

C. a book that has no net force acting on it and is sitting on a table

Explanation:

Step1: Define static equilibrium

An object is in static equilibrium when it is at rest and the net force acting on it is zero.

Step2: Analyze each option

Option A

A rolling ball with a net - force acting on it is in motion and not in equilibrium as there is a non - zero net force.

Option B

A cruising car is in motion. Static equilibrium requires the object to be at rest.

Option C

A book sitting on a table with no net force acting on it is at rest and satisfies the conditions for static equilibrium.

Option D

A vase with a net force acting on it is not in equilibrium as the net force is non - zero.