CAX SCI KS3 Forces

A force is:

• a spring.

• a movement.

• an engine.

• a push or a pull

Which answer shows three non-contact forces?

• magnetism, gravity, friction

• gravity, friction, upthrust

• gravity, static electricity, magnetism

• upthrust, static electricity, friction

The unit of force is the:

• newton.

• gram.

• kilogram.

• meter

A boat will float because:

• gravity does not work over water

• it is built out of light materials.

• upthrust pushes against its weight.

• it has air inside it.

Density is:

• the weight of a fixed mass of something.

• the volume of a fixed weight of something.

• the weight of a fixed volume of something.

• the mass of a fixed volume of something.

An elastic material:

• does not stretch.

• stretches and stays in its new shape.

• stretches and then goes back to its original shape.

• cannot be squashed.

What are the units for weight and mass?

• weight – newtons;

  mass – kilograms

• weight – kilograms;

  mass – newtons

• weight - kilograms

  mass - kilograms

• weight – newtons;

  mass - newtons

Which is true?

• Your weight would be the same on the Earth and on the Moon.

• Your mass would be the same on the Earth and on the Moon.

• Your weight would be more on the Moon than on the Earth.

• Your mass would be less on the Moon than on the Earth.

What do most force meters have inside them?

• a light bulb

• a spring

• wires

• a battery

Which of the following sentences about friction is not correct?

• Friction can make an object get hotter.

• Friction wears car tyres away.

• Friction slows down a ball rolling in grass.

• Friction can speed up a falling object.