. A box of mass 25 kg starts from rest and slides
down an inclined plane 8 metre long and 5
metre high. It is found to move at the bottom at
7 m/sec. What is the force of friction?
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Answered by
4
Explanation:
Work(total) = change in kinetic energy
W(g) + W(f) = 1/2(m)(v)^2 - 0
Mgh+ W(f) = 1/2M×49
25×10×5 +w =(25×49)/2
W = - 637.5 J
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Answered by
0
Answer: 132.5 N
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