Stretching springs | Starter Quiz | Oak National Academy

Somebody slides down a slide. What force is causing them to speed up as they slide?

• gravitational

• friction

• tension

• air resistance

Answer explanation

The gravitational force pulls the person downwards and speeds them up.

Somebody slides down a slide. What two forces are opposing the motion as they slide?

• gravitational

• friction

• tension

• air resistance

Answer explanation

The force of friction acts between the person and the slide. There is also the force of air resistance as they move through the air.

Which of the following can a force do to an object?

• Make it speed up.

• Make it slow down.

• Decrease its mass.

• Change its shape.

Answer explanation

A force can speed things up or slow them, but can also change the shape of objects.

Some masses are placed on a balance. Which force acts downwards on the masses?

• upthrust

• friction

• gravitational

• tension

Answer explanation

The gravitational force pulls downwards, causing the weight of the masses on the scales.

The image shows a newton meter which has a spring inside it. Why is a spring used in the newton meter?

• The spring stops the hook from moving.

• The spring stretches more when there is a larger force on it.

• The spring stretches less when there is a larger force on it.

• The spring makes the meter strong enough to hold things.

Answer explanation

The spring is stretched when a force acts on it, that makes it longer and the pointer moves on the scale.

The picture shows a steel paperclip on some thread being attracted by a magnet. The paperclip is stationary. Which statements must be true?

• There is an upwards magnetic force acting on the paperclip.

• The downwards gravitational force is equal to the upwards magnetic force.

• There is downwards force on the paperclip due to tension in the thread.

• The tension in the thread is equal to the upwards magnetic force.

• The upwards and downwards forces are equal so there is no resultant force.

Answer explanation

The paperclip is pulled upwards by a magnetic force but downwards by two forces, the gravitational force and tension in the thread.