True: forces are measured in Newtons, a push and a pull are forces, friction acts in the opposite direction to movement, gravity is a non-contact force, gravity is greater on Jupiter than Earth, streamlined objects can travel faster than non-streamlined objects, False: forces are measured in grams, friction speeds objects up, an ice-skating rink is a high friction surface, friction is a non-contact force, gravity is smaller on larger planets, upthrust is not an example of a force,

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