Physics
What is an inclined plane? What is its mechanical advantage? Give two examples where it is used.
Machines
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Answer
An inclined plane is a slanting wooden plank or a sloping surface. It is a simple machine which is used to move a load up with a less effort.
The effort required to push a load up an inclined plane is less than the load. Thus, the mechanical advantage of an inclined plane is always greater than 1.
Example :
Hospitals and huge buildings are provided with ramps which help nurses to move up the patients on a stretcher or to carry heavy equipments.
A coolie while loading a heavy drum on a truck uses a wooden plank. One end of the plank is kept on the edge of the truck and the other end on the ground. He then pushes the drum along the sloping surface and places it on the truck.
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Related Questions
The mechanical advantage of an actual pulley is less than 1. Give a reason. What is the justification for using the pulley then?
Draw a neat labelled diagram showing a pulley being used to lift a load. How are load and effort related in an ideal situation ?
Given below is a crossword puzzle based on this lesson. Read the clues across and clues downwards and fill up the blank squares.

Across:
- It makes work easier …………… .
- A …………… is a simple machine which is used for raising a load up by applying the effort downwards.
- Work is said to be done when a …………… applied on a body moves it.
Down:
- …………… force at the fulcrum reduces the mechanical advantage.
- A …………… and axle is also a simple machine.
- Screw driver is an example of wheel and …………… .
- …………… is a rod which can turn about a fixed point (fulcrum)
In a machine an effort of 10 kgf is applied to lift a load of 100 kgf. What is its mechanical advantage?