Refresher Quiz RPc

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Refresher Quiz RPc

1 What is a force?

a push or a pull

Refresher Quiz RPc

2 What is drag?

air resistance or water resistance

Refresher Quiz RPc

3 Why do car tyres wear away?

friction with the road

Refresher Quiz RPc

4 What is upthrust?

a force pushing up (from water or the ground etc)

Refresher Quiz RPc

5 What is air resistance?

friction caused by air

Refresher Quiz RPc

6 What are the scientific units for measuring speed?

metres per second (m/s)

Refresher Quiz RPc

7 What does weight mean?

the force of gravity on something

Refresher Quiz RPc

8 Describe two things that forces can do.

Two from:

changes shape

changes speed

changes direction

Refresher Quiz RPc

9 Describe two ways that friction is useful.

Answers might include:

allows you to walk

allows you to write

stops you slipping off your chair

Refresher Quiz RPc

10 What is the shape of the magnetic field around a wire with a current flowing in it?

circular

Refresher Quiz RPc

11 What is a permanent magnet?

a magnet that does not depend on electricity

Refresher Quiz RPc

12 What do the lines around a magnet like this show?

magnetic field

Refresher Quiz RPc

13 What will happen if you put the S ends of two magnets together?

they will repel

Refresher Quiz RPc

14 Which way does the needle of a compass point?

North

Refresher Quiz RPc

15 Name two magnetic elements.

Two from:

iron

nickel

cobalt