How is the mechanical advantage related to the velocity ratio for an actual machine? State whether the efficiency of such a machine is equal to 1, less than 1 or more than 1.
How is the mechanical advantage related to the velocity ratio for an actual machine? State whether the efficiency of such a machine is equal to 1, less than 1 or more than 1.

Solutions:

For an actual machine, the mechanical advantage is defined as the product of its efficiency and velocity ratio. Expression for machine advantage is

M.A. = V.R. × η

The efficiency of such a machine is always less than 1.