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Question
Classify the following as a lever, a pulley and an inclined plane:
An axe
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Solution
An axe – A wedge
RELATED QUESTIONS
State whether the following statement is True or False.
In an ideal machine, work done on load is equal to the work done by effort.
What is the principle on which a machine works?
Answer the following.
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The diagram below shows a wheel barrow. Mark position of fulcrum F and draw arrows to show the directions of load L and effort E. What class of lever is the whell barrow? Give one more example of the same class of lever.

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A simple machine enables us to lift a load of 10,000 N by the application of an effort of 500 N. However, when the point of application of the effort moves through 2.5 m, the load gets raised through 10 cm only. What are the values of the:
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(ii) V.R. and
(iii) Efficiency of the machine?
Classify the following as a lever, a pulley and an inclined plane:
Scissors
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
______ help us to make work easier.
Name a machine for each of the following uses:
- to multiply the force,
- to change the point of application of force,
- to change the direction of force,
- to obtain the gain in speed.
