Why VR is not affected by friction?

Explanation:

VR ( Velocity ratio ) is the ratio of displacement to effort of load. So it is obvious that displacement takes place. Frictional force cannot change the displacement as it only an opposing force. So VR is not affected by friction.

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the answer is false

explanation:

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explanation:

wind is defined by the direction it blows from.   for example, a wind blowing from north to south is called a northerly wind.