A gardener pushes a lawn roller through a distance of 20m. If he applies a force of 20kg weight in a direction inclined at 60° to the ground, find the work done by him
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Answer:
S = 20m
m = 20Kg
Assuming g = 10ms⁻²
θ = 60⁰
W = ?
Explanation:
F = mg
F = 20 x 10
F = 200N
W = F cosθ x S
W = 200(cos 60⁰) x 20
W = 200(1/2) x 20
W = 100 x 20
W = 2000J
or
W = 2 kJ
∴ The work done by the man is 2000J or 2kJ.
HOPE IT HELPS!!!!!!
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