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प्रश्न
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
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उत्तर
The effort in the centre, the load on one side and the fulcrum on the other side make a lever of the third order.
संबंधित प्रश्न
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.
A crowbar of length 120 cm has its fulcrum situated at a distance of 20 cm from the load. Calculate the mechanical advantage of the crowbar.
State whether the mechanical advantage of an inclined plane is equal to 1, less than 2 or greater than 1?
What is the relationship between the mechanical advantage and the velocity ratio for:
(i) An ideal machine,
(ii) A practical machine.
Give an example of the following use of a machine to change the point of application of the force.
A cook used a ‘fire tong pair’ of length 32 cm. to lift a piece of burning coal of mass 500 g. If he applies his effort at a distance of 8 cm from the fulcrum, what is his effort? Assume friction etc. to be absent. Also, obtain values of the M.A. and the V.R. of this ‘machine’.
Classify the following as a lever, a pulley and an inclined plane:
Nutcrackers
Classify the following as a lever, a pulley and an inclined plane:
A crane
Which machine will you use to do the following work? Write their type.
To remove the lid of a tin.
What is a lever?
