Which of the following is required to make a toy car that is sitting still on the floor begin to move?

Placing it on a different floor

If you observe a playground swing that was still a moment ago now moving back and forth, what can you scientifically conclude?

The swing will continue moving forever.

A force was applied to the swing.

A change in the object's motion

The object staying perfectly still

The ball ran out of its own energy.

No forces were acting on the ball.

A force, like friction from the grass, must have acted on the ball.

The ball will start rolling again on its own.

A bicycle using its brakes to slow down.

A book sitting completely still on a shelf.

A kite being lifted higher by the wind.