7K - Forces

Front

What can forces do?

Back

Make things start or stop moving, change the shape of things, make moving things change direction.

Front

Which answer shows three non-contact forces? Options: magnetism, gravity, friction, gravity, friction, upthrust, gravity, static electricity, magnetism, upthrust, static electricity, friction

Back

gravity, static electricity, magnetism

Front

What are the units used for measuring forces?

Back

newtons

Front

Which is true? Options: 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.

Back

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

Front

What is used to measure forces?

Back

a force meter with a spring inside

Front

What does an elastic material do? Options: does not stretch., stretches and stays in its new shape., stretches and then goes back to its original shape., cannot be squashed.

Back

stretches and then goes back to its original shape.

Front

What is the extension of a spring?

Back

The stretched length minus the original length.

Front

At which point on this graph does the extension stop being proportional to the force? Options: A, B, C, D

Back

C

Front

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.

Back

Friction can speed up a falling object.

Front

Which of these would produce the most friction when they rub together? Options: a rough surface and a smooth one, two smooth surfaces, two rough surfaces, two smooth surfaces with oil between them

Back

two rough surfaces