3. Reducing friction in a machine

Physics

1 answer:

Zarrin [17]3 years ago

4 0

Answer:

Explanation:

To increase the efficiency of a machine, it is advisable that one reduces friction within the machine parts as much as possible through common procedures such as greasing and oiling. This is helps to reduce the amount of energy lost due to friction hence contributing to output which finally is useful in calculating efficiency of a machine.

Efficiency can't be 100% since it is found by dividing work output verses input but the output is usually slightly less than the input energy due to energy losses within a machine. The losses that occur are mainly attributed to frictional losses.

Here efdiciency and work output are given but input is missing. Converting efficiency into decimal we have 0.75 and since efficiency=output/input then the input will be given by output/efficiency and by substitution 240/0.75=320 J

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