1) A force is: a) a spring. b) an engine. c) a movement d) a push or a pull. 2) Which answer shows three non-contact forces? a) magnetism, gravity, friction b) gravity, friction, upthrust c) gravity, static electricity, magnetism d) upthrust, static electricity, friction 3) The unit of force is the a) newton. b) kilogram c) gram d) metre. 4) A force can be measured using a) a stop clock b) a ruler c) a thermometer d) a force meter 5) A boat will float because: a) gravity does not work over water b) it is built out of light materials. c) upthrust pushes against its weight d) it has air inside it 6) Density is a) the weight of a fixed mass of something b) the volume of a fixed weight of something c) the weight of a fixed volume of something d) the mass of a fixed volume of something 7) The density of water is 1 g/cm3. Which of these objects will float in water? a) density = 2 g/cm3 b) weight = 2 N c) density = 0.5 g/cm3 d) mass = 1 g 8) An elastic material: a) does not stretch. b) stretches and stays in its new shape. c) stretches and then goes back to its original shape. d) cannot be squashed. 9) What are the units for weight and mass? a) weight – newtons; mass – kilograms b) weight – kilograms; mass – newtons c) weight – kilograms, mass – kilograms d) weight – newtons, mass – newtons 10) Which is true? a) Your weight would be the same on the Earth and on the Moon. b) Your mass would be the same on the Earth and on the Moon. c) Your weight would be more on the Moon than on the Earth. d) Your mass would be less on the Moon than on the Earth. 11) What do most force meters have inside them? a) a light bulb b) a spring c) wires d) a battery 12) Which of the following sentences about friction is not correct? a) Friction can make an object get hotter. b) Friction wears car tyres away. c) Friction slows down a ball rolling in grass. d) Friction can speed up a falling object. 13) Which of these would produce the most friction when they rub together? a) a rough surface and a smooth one b) two smooth surfaces c) two rough surfaces d) two smooth surfaces with oil between them 14) Which example shows unhelpful friction? a) friction between a tyre and the road b) friction in the wheel axles of a bicycle c) friction between paper and the point of a pencil d) friction between your shoes and the floor 15) Which of the following is not an example of a lubricant? a) grease for bicycle chains b) rubber on car tyres c) water on swimming pool tiles d) oil in a car engine 16) The speed of a car is a measure of how _________ it is travelling. Which is the missing word? a) far b) fast c) long d) high 17) If a car goes faster: a) the thinking distance does not change. b) its stopping distance increases c) its braking distance does not change. d) its braking distance gets less. 18) Which of these factors will help a car to stop quickly? a) a tired driver b) going uphill c) worn tyres d) a wet road 19) This graph shows the distance moved by someone catching a bus. Which part of the graph shows the person waiting at the bus stop? a) a to b b) b to c c) c to d d) d to e

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