Forces

Which words best describe forces?

• up and down

• push and pull

• in and out

• quick and slow

What is gravity?

• A force created by a body of water.

• A pushing force exerted by the Earth.

• A pulling force exerted by the Earth.

• A dragging force which slows things down.

Choose the two forces that would be present during a sky dive.

• Gravity and air resistance.

• Friction and gravity.

• Water resistance and air resistance.

• Water resistance and gravity.

Which statement is NOT true?

• Friction produces heat.

• Friction is a force.

• Friction slows moving objects down.

• Friction is stronger than gravity.

In which scenario would friction be a present force?

• A man sky diving from a plane.

• A girl riding a bike.

• A ship sailing in the ocean.

• A boy swimming in a swimming pool.

What can we do to reduce the effects of water and air resistance on objects?

• Make them lighter.

• Make them heavier.

• Make them heavier or lighter.

• Make them streamlined.

Which 3D shape would fall through water the fastest?

• A cube.

• A cone.

• A sphere.

• A cylinder.

What is water resistance?

• The pushing force felt in water.

• A pulling force felt in water.

• The force which makes things sink.

• The force which creates waves.