Question

the concept of inertia lies in newtons first law of motion, which is also termed as the \law of inertia.\ according to this law - an object will continue to be in the state of rest or in a state of motion unless an external force acts on it.\ which choice below is not an example of inertia? o a volleyball player jumps and hits the ball with a spike. the ball was moving slowly upward, but after the hit, it suddenly moves fast and downward. o when you are on a roller coaster and it excell erates and your body wants to stay at rest and you feel like youre being pressed into the cart. o you push a scooter across the floor. if no one stops it and the floor is smooth, the ball keeps rolling for a while. o the ball is just sitting still on the court. it wont start moving unless someone kicks or pushes it.

Explanation:

Newton's first law of motion (Law of Inertia) states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• The first option: The ball won't move unless a force (someone kicks or pushes it) acts on it. This is in line with the law of inertia (object at rest stays at rest unless a force acts).
• The second option: The ball keeps rolling (in motion) as long as no force (like friction from a rough floor) stops it. This follows the law (object in motion stays in motion unless a force acts).
• The third option: When on a roller - coaster that accelerates, the body wants to stay at rest (initial state) which is why there is a feeling of being pressed into the cart. This is an example of inertia (resisting the change in state of motion).
• The fourth option: A volleyball player spikes the ball. The ball was moving slowly and after the hit (a force is applied), its motion changes (moves fast and downward). This is an example of a force changing the motion of an object. According to Newton's first law, inertia is about an object maintaining its state (rest or uniform motion), not about a force causing an acceleration (that is more related to Newton's second law \(F = ma\)).

Answer:

A volleyball player jumps and hits the ball with a spike. The ball was moving slowly upward, but after the hit, it suddenly moves fast and downward.