Physics
If the effort needed is less than the load, then mechanical advantage of the machine is:
- Greater than 1
- Less than 1
- Equal to one
- None of these
Answer
Greater than 1
Reason — Mechanical advantage (M.A.) is defined as the ratio of the load force to the effort force. When the effort force required is less than the load force, the mechanical advantage is greater than one, indicating that the machine amplifies the input force to overcome the load.
Related Questions
The correct relationship between the mechanical advantage (M.A.), velocity ratio (V.R.) and efficiency (η) is:
- M.A. = η x V.R.
- V.R. = η x M.A.
- η = M.A. x V.R.
- None of these
Which of the following relations is wrong?
- Work input = Effort x Displacement of effort
- Work output = Load x Displacement of load
- Efficiency = Work input / Work output
- Mechanical advantage = Velocity ratio x Efficiency
Select the incorrect statement:
- A machine always has efficiency less than 100%.
- The mechanical advantage of a machine can be less than 1.
- A machine can have mechanical advantage greater than the velocity ratio.
- A machine can be used as a speed multiplier.
The lever for which mechanical advantage is less than 1 has:
- Fulcrum at the mid-point between load and effort.
- Load between effort and fulcrum.
- Effort between fulcrum and load.
- Load and effort acting at the same point.