Advertisements
Advertisements
Question
Name the levers mentioned in the following passage. Identify the fulcrum, load, and effort of each and say which type of lever it is.
Ravi and Savita sit on a seesaw in a garden. In the meantime, a gardener is trimming trees in the garden. He puts the leaves and other garbage in the wheelbarrow. Later, Ravi gets thirsty and he buys lemon sherbet. The sherbet seller cuts the lemon and squeezes it using a lemon squeezer. He puts small pieces of ice in the glass with the help of the tongs.
Advertisements
Solution
Levers mentioned in the passage are:
- Sea-saw: It is a first-order lever.

- Wheelbarrow: It is a second-order lever.

- Lemon squeezer: It is a third-order lever.

- Tongs: It is a fourth-order lever.

RELATED QUESTIONS
What is an ideal machine?
Can a machine have an efficiency of 100%? Give a reason to support your answer.
State if the following statement is true or false. Correct the statement if it is false.
Work done by a machine is always more than the work done on a machine.
Fig show a system of four pulleys. The upper two pulleys are fixed and the lower two are movable.

(i) Draw a string around the pulleys. Also show the place and direction in which the effort is applied.
(ii) What is the velocity ratio of the system?
(iii) What is the mechanical advantage of the system?
(iv) What assumption do you make in arriving at your answer in part (iii)?
What is the efficiency of a machine?
Classify the following as a lever, a pulley and an inclined plane:
Scissors
Classify the following as a lever, a pulley and an inclined plane:
An axe
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
Identify and mention the types of simple machines.
![]() |
![]() |
![]() |
| ______ | ______ | _______ |
![]() |
![]() |
![]() |
| ______ | ______ | ______ |
Simple machines makes work easier by trading ______ for force.






