Q.

A block of mass 10 kg is to be raised from the bottom to the top of a smooth incline of inclination30° and length 5 m. work done is

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a

250 J

b

240 J

c

245 J

d

235 J

answer is B.

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Detailed Solution

m = 10 kg

Question Image

h = 5 sin 30º

h=52

w=ΔPE=mgh.sine(of angle)

=10×10×52

w=250J

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A block of mass 10 kg is to be raised from the bottom to the top of a smooth incline of inclination30° and length 5 m. work done is