A block of mass m = 11. 7 kg is to be pushed a distance of s = 4.65 m along an incline and raised to a distance of h = 2.86 m. Assuming frictionless surface, calculate the work done in applying a force parallel to the incline to push the block up at a constant speed. (Take, g = 9.8 )
Given,
From the figure,
Also, component of mg along the incline is mg sin .
Work done by this force = mg sin · s
= 11.7 x 9.8 x 0.615 x 4.65
= 11.7 x 9.8 x 2.86 = 327.9 328J