UUUU Fractice Problems 8 :
1. A force of 40 N is required to pull up cylindrical barrel of mass 2.5 kg through a distance of 7.5 m along the
inclined plane as shown in diagram alongside. Calculate.
(a) Force of gravity acting on the barrel. (Take g = 10 ms )
(b) Work done by the force in pulling body along the inclined plane
(c) Work done against the force of gravity.
(a) 25 N, (b) 300 J, (c) 93.25 J]
7.5 m
40N
30°
B
29
1. A force of 40 N is required to pull up cylindrical barrel of mass 2.5 kg through a distance of 7.5 m along the
inclined plane as shown in diagram alongside. Calculate.
(a) Force of gravity acting on the barrel. (Take g = 10 ms )
(b) Work done by the force in pulling body along the inclined plane
(c) Work done against the force of gravity.
(a) 25 N, (b) 300 J, (c) 93.25 J]
7.5 m
40N
30°
B
29
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