gc physics textbook chapter 6 problems (id: e4058aea0)

本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 IB物理学

[问答题]
A hand exerts a constant horiznalxl5:-vn : dontal force ozxo+. +wqs+e, mfszv+n a block that is free to slide on a frictionless surface (Fig.6-30). The block starts+ m+sq+efz vsz o,+wx. from rest at þoint A, and by the time it has traveled a distance $d$ to point B it is traveling withe bint $o$ point B it is traveling with speed $\nu_\mathrm{B}$.When the block has traveled another distance $d$ to point C, will its speed be greater than, less than, or equal to 2$\nu_\mathrm{B}$? Explain your reasoning

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