Question

4.
A person in a wheelchair exerts a force of 25 N to go up a ramp that is 10 m long
The weight of the person and wheelchair is 60 N and the height of the ramp
is 3 m.

Answer 1

Answer:

72%

Calculating Efficiency:

The amount of work obtained from a machine is always less than the amount of work put into it. Thisis because some of the work is lost due to friction. The efficiency of a machine can be calculated usingthe following formula:Percent Efficiency = (work output-Machine / work input-You) x 100%