1) What kind of force is gravity? a) pushing b) contact c) pulling d) non-contact 2) What fraction of the gravity of Earth would you experience on the moon? a) one eighth b) one fifth c) one third d) one sixth 3) Where does gravity always pull things to? a) the left b) the centre of the earth c) the right d) the ground 4) What do we measure in grams and kilograms? a) weight b) length c) height d) mass 5) What unit do we use to measure gravitational force? a) gram b) newton c) pound d) inch 6) What is the name of the piece of equipment we use to measure gravitational force? a) spring balance b) scales c) newton meter d) measuring tape 7) Mass is... a) the weight of something b) how heavy it is c) the amount of matter in something d) how long something is 8) Friction always acts in... a) the same direction to the movement b) the opposite direction to the movement 9) Friction... a) speeds an object up b) slows an object down 10) The smoother the material a) the smaller the frictional force b) the greater the frictional force 11) Adding a tread or pattern a) increases frictional force b) reduces frictional force 12) When friction takes place this also creates a) light b) heat 13) A lever is a simple machine that is designed to create... a) a mechanical disadvantage b) a mechanical advantage c) a force advantage d) a force disadvantage 14) If you use a lever well... a) a smaller force can have a greater effect b) a greater force can have a smaller effect 15) How much effort is needed to move this load? a) 30N b) 10N c) 20N d) 50N 16) How much effort does Fady need to use to lift this load 1m from the ground? a) 30N b) 60N c) 20N d) 15N 17) Water resistance is also called a) drag b) pull c) push d) drop 18) Water resistance always acts... a) in the same direction as the movement b) in the opposite direction to the movement 19) The smaller the surface area, the more water particles will push against an object, causing more drag a) True b) False 20) What does a streamlined shape allow? a) Things to move through the water faster b) Things to move through the water slower c) Things to float on the water d) Things to sink in the water 21) Which of these is deliberately designed to increase water resistance? a) scuba diver's flippers b) the bow of a boat c) a paddle d) a swimming hat

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