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The force that enables us to remain on the Earth’s surface is ______. a. force b. friction c. a factor d. gravity 5 a. inertia b. friction c. acceleration d. gravity 3 The force that causes resistance when rubbing sandpaper on wood is called _______. ecosystemforkids.com a. force b. the ability for an object to stay in motion c. a state of rest of an object or uniform motion in a straight line unless a force acts on it d. the force of gravity ecosystemforkids.com ecosystemforkids.com A pull or push that acts on an object is referred to as _______. ecosystemforkids.com Inertia refers to ______ . a. friction b. inertia c. acceleration d. gravity 2 8 Which word below refers to a change in the position of an object ? Speed refers to the rate of change in the _____ . a.friction b. inertia c.acceleration d. work 1 a. a lever b. pivot point of a lever c. handle of a lever d. none of the above 10 ecosystemforkids.com What is the fulcrum ? ecosystemforkids.com ecosystemforkids.com ____ is when a force moves an object over a distance. a. speed b. motion c. velocity d. accelerating 9 ecosystemforkids.com Get more on: www.ecosystemforkids.com a. motion over time b. direction over time c. speed over time d. distance over time 4