1) Split the force when we use several of them a) Pulley b) Inclined plane c) Wheel and axle 2) Sloped surface can be used to move objects upwards with less force a) Pulley b) Inclined plane c) Wheel and axle 3) Attracted the object to center of the planet a) Gravity b) Mass c) Motion 4) Newton's first law of motion a) Mass and acceleration b) Law of force c) Law of inertia

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