This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
Let's calculate the work done against friction. Step 1: Calculate the useful work done (Work output). The useful work done is the work done on the load. W_out = Load × Vertical height W_out = 20 N × 10 m W_out = 200 J Step 2: Use the efficiency to find the total work input. Efficiency () is given by: = W_outW_in × 100\% Given = 40\%, we can rearrange to find W_in: W_in = W_out W_in = 200 J0.40 W_in = 500 J Step 3: Calculate the work done against friction. The work done against friction is the difference between the total work input and the useful work output. W_friction = W_in - W_out W_friction = 500 J - 200 J W_friction = 300 J The work done against friction is 300 J.