Question

If the effects of heat and friction are ignored, the amount of work output is always _______ the amount of work input, even when using a simple machine. A. the same as B. less than C. greater than D. It changes by situation.

Answer 1

Answer;

Same as

Explanation;

• If the effects of heat and friction are ignored, the amount of work output is always same as the amount of work input, even when using a simple machine.
• Simple machines make work easier, but they do not decrease the amount of work one has to do.
• A simple machine can change the amount of force applied to an object, and the distance over which the force is applied.
• The efficiency of simple machines is the ratio of work output to work input as a percentage. However, the efficiency is never 100% due to heat and friction. Therefore, if heat and friction then the efficiency would be 100% which means that the work input is equal to the work output.