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;

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.

Velocity=total displacement/timefrom house to store is 500 from store to neighbor is 200 therefore total displacement=500+200=700metrestherefore,700metres/910seconds=0.8metres per second