Complete the following sentences using words from the box below.
electrostatic | friction | gravitational | magnetic |
i) The force that keeps the Earth in orbit around the sun is ............................................................................. attraction.
[1]
ii) The force that opposes motion between two surfaces is .............................................................................
[1]
iii) The force that can move small pieces of paper towards a plastic comb is ..............................................................attraction.
[1]
Which of these statements is true for a vector quantity?
It has size only
It has direction only
It has direction and size
It does not have direction or size
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