Den pushes a desk 400 cm across the floor. He exerts a force of 10 N for 8 s to move the desk. What is his power output? (Power: P = W/t) a. 1.25 W b. 5 W c. 40 W d.500 W
We Know, P = W/t P = F * s/t Here, F = 10N s = 400cm = 4m t = 8 sec. Substitute their values in to expression, P = 10 * 4/8 P = 10 * 1/2 P = 5 Watt So, your final answer is 5 W Hope this helps!