motion

What happens when a swimmer pushes against the pool wall?

• The swimmer stays still.

• The swimmer moves in the same direction as the push.

• The swimmer moves in the opposite direction of the push.

• The swimmer sinks.

When sitting on a chair, what force is often overlooked?

• The force of the chair on the person.

• The force of gravity.

• The force of the air.

• The force of the person on the chair.

What force opposes the movement of a book being pushed across a table?

• Gravity

• Friction

• Magnetism

• Wind

In space, what causes a rocket to accelerate?

• The force of the expelled gases.

• The force of the Earth.

• The force of gravity.

• The force of the sun.

Why does a bullet have greater acceleration than a recoiling rifle?

• The bullet has less mass.

• The rifle is lighter.

• The rifle is stronger.

• The bullet is heavier.