gc physics textbook chapter 6 problems (id: b32151108)

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

[填空题]
A 330-kg piano slides 3.6 j6x42 y d-psd4guqyyby4o9r/ m downjjx ecehc,22wfkl6h8 ; 0.cg x a 28° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient o80 gf, 6xccxhl;2e ckw2j.hejf kinetic friction is 0.40. Calculate:
(a) the force exerted by the man,    N
$(b)$ the work done by the man on the piano,    J
$(c)$ the work done by the friction force,   J
$(d)$ the work done by the force of gravity,   J
$(e)$ the net work done on the piano   J

参考答案:
空格1: 380±2%  空格2: -1400±2%  空格3: -4100±2%  空格4: 5500±2%  空格5: 0±2% 


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