Question

What is meant by velocity ratio of a lever is 3 and efficiency of a pulley is 60%

Answer 1

Velocity ratio of a lever is 3 means distance travelled by effort is 3 times the distance travelled by the load.Efficiency of the pulley is 60%means 40% of the energy is lost in the machine due to the friction.

Answer 2

Answer:

V.R of a lever is 3 and efficiency of a lever is 60% ....Let me explain you..

Explanation:V.R of a lever is 3 means effort distance of the lever is 3 times more than the effort distance of the load.

and

Efficiency of a lever is 60% means 40% of the energy is wasted due to friction as no machine is Friction less.

hope this will help you.