1) What is a non contact force? a) Magnetism b) Elasticity c) Gravitational d) Tension e) Air resistance f) Friction 2) What unit is used to measure forces? a) N b) mg c) km d) ml e) N/m f) cm 3) What can happen to an object if the forces are unbalanced? a) Accelerate b) Decelerate c) fly d) swim e) sink

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