# In Actual Machines

By BYJU'S Exam Prep

Updated on: September 25th, 2023

### In actual machines

1. Mechanical advantage is greater than the velocity ratio.
2. Mechanical advantage is equal to the velocity ratio.
3. Mechanical advantage is lesser than velocity ratio.
4. None of these

## In actual machines, Mechanical advantage is lesser than velocity ratio.

Solution:

Mechanical advantage: When effort (P) balances a load (W) in simple machines, the ratio is called Mechanical advantage (MA).

Velocity Ratio(VR): Ratio between the distance moved by the effort to the distance moved by the load.

VR = distance moved by the effort(dp)/ distance moved by the load(dw)

Efficiency: In a simple mechanism, it is defined as the ratio of mechanical advantage to the velocity ratio.

η= M.A.V.R.

An ideal machine’s efficiency is 100% or unity, so the mechanical advantage equals the velocity ratio.

In the actual machine, efficiency is less than 1

η<1 ⇒ M.A./V.R. < 1 ⇒ M.A. < V.R.

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