Question:

Can anybody confirm my answer on a question on work done.?

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Q3 A gardener pulls a heavy sack of soil along a horizontal path for a distance of 15 m. He does this by applying a force F of 80 N at an angle of 70 degrees to the horizontal. Calculate the amount of work done by the gardener during this process. Choose the option that is Closest to your answer and pencil across one cell in row 3.

KEY FOR Q3

A) 113 J

B) 274 J

C) 410 J

D) 1200 J

E) 11760 J

I think the answer is C

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2 ANSWERS


  1. I Agree

    (80 x cos80 x 15 ) J = 410 3 sig fig


  2. Yes, W = Fdcosα = 80×15×cos70 ≈ 410 J

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