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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
Scissors
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उत्तर
Scissors – A lever
संबंधित प्रश्न
State whether the following statement is True or False.
A boy does work while pushing a wall.
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
What is the principle on which a machine works?
State the kind of lever which always has mechanical advantage less than 1. Draw a labelled diagram of such a lever.
What is an inclined plane?
What is an ideal machine?
What is the efficiency of an ideal machine?
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?
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:
A staircase
