本题目来源于试卷: gc physics textbook chapter 4 problems，类别为 IB物理学
[问答题]
Only one force acts on an object.w9lc2/ts m lzjz t845zzb.1rw Can the object3qlibx03p7i vl/5k*.zowz + 0- xnmvxn8topy have zero acceleration? Can it have zero 3bzplxo80 30iyxzn*/v5vw.li q t+n7- xmkp ovelocity? 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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