Physics
Draw a neat labelled diagram showing a pulley being used to lift a load. How are load and effort related in an ideal situation ?
Related Questions
Draw diagrams to illustrate the positions of fulcrum, load and effort, in each of the following :
(a) a see-saw
(b) a beam balance
(c) a nut cracker
(d) a pair of forceps
The mechanical advantage of an actual pulley is less than 1. Give a reason. What is the justification for using the pulley then?
What is an inclined plane? What is its mechanical advantage? Give two examples where it is used.
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)