本题目来源于试卷: newnewnewnew，类别为 IB物理学
[问答题]
Only one force acts onu4)tp 2)qwy.dt )yasqmg*/ u0 hawuz pw+za 52jx9ot fp fs*9c2 zgq4, an object. Can the object have zero acceleration? Can it have z f2zj9xp*gt,o9q 4sc fero velocity? 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.
本题详细解析:
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