The student can calculate the pulley's efficiency by dividing the work output by the work input.
To calculate the pulley's efficiency, the student would need to compare the amount of work done on the pulley (output work) to the amount of work put into the pulley (input work) and then divide the output work by the input work and multiply it by 100 to express the efficiency as a percentage.
To calculate the pulley's efficiency, the student can determine the ratio of the output work (the work done on the log) to the input work (the work done by the student) and multiply it by 100%. This can be expressed as Efficiency = (Output Work / Input Work) * 100%.
