本题目来源于试卷: newnewnewnew，类别为 IB物理学
[问答题]
Only one force acts on an object. 1 n:tqx (h--7qs wapuma6 rxn+Can the object have zero acceleratio.qyf7ih5skc2tc 8u l (n? Can it have zero velociyf 8t.lkiu 7h sqc2(5cty? Explain.
参考答案:
If only once force acts on the object, then the net force cannot be zero. Thus the object cannot have zero acceleration, by Newton’s second law. The object can have zero velocity for an instant. For example, an object thrown straight up under the influence of gravity has a velocity of zero at the top of its path, but has a non-zero net force and non-zero acceleration throughout the entire flight.
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