A man weight 800N climbs up a stairs to height of 15m in 12.5s. What is the man''s average power output?

Answer Details

The question is asking about the average power output of a man who climbs a set of stairs. Power is the rate at which work is done or energy is transferred, and it is calculated by dividing the work or energy by the time taken to do it. In this case, the work done is equal to the force exerted by the man (800N) multiplied by the distance he climbs (15m), which is equal to 12,000 joules (J). The time taken to climb the stairs is given as 12.5 seconds. Therefore, the man's average power output is the work done divided by the time taken, which is equal to 960 watts (W). So the answer is 960W.