Question

A lawn roller is pulled along a horizontal surface through a distance of 20m by a rope with a force of 200N. If the rope makes an angle of 60° with the vertical while pulling , the amount of work done by pulling force is...​

Answer 1

Answer:

Force applied = 200 N

Distance = 20 metres

angle = 60° with vertical,

so 30° with horizontal.

To find:

Work done by pulling force.

Calculation:

First of all, we can calculate the component of force in the horizontal direction.

F' = F cos(30°)

=> F' = 200 × (√3/2)

=> F' = 100√3 N

Work done = F' × d

=> W = 100√3 × 20

=> W = 2000√3 Joules.

=> W = 2√3 KJ.

Answer 2

Answer:

Explanation:

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