(Inverse determination of force from work) A gardener pushes a lawn-mower along a…
PHYSICS · Subjective · CBSE · Physics · Work and Energy · Work and Energy
Problem
(Inverse determination of force from work)
A gardener pushes a lawn-mower along a straight 10m path on level ground. The handle of the mower makes a 45∘ angle with the horizontal.
(a) If the work done on the mower is 1.50kJ, calculate the magnitude of the force exerted by the gardener.
(b) Keeping the same force found in part (a), the gardener later tilts the handle so that it makes a 60∘ angle with the horizontal and again moves the mower through 10m. Determine the work done in this second case.