aw: when the object is accelerated or changes its speed, the change rate is proportional to the external force. For example, if the force is doubled, the acceleration will also be doubled. The greater the mass (or the amount of material) the object is, the smaller the acceleration is (the same force acting on the object with a mass of two times the acceleration.) The car can provide a well known example of the greater the engine power, the greater the acceler
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