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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
Nutcrackers
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उत्तर
Nutcrackers – A lever
संबंधित प्रश्न
Select the correct alternative:
For an ideal machine, the efficiency is
show a nut cracker In the diagram, mark the position of the fulcrum F and the line of action of load L and effort E .
The correct relationship between the mechanical advantage (M.A.), the velocity ratio (V.R.) and the efficiency (n) is ______.
Define Efficiency
Fig. shows a spade. It is being used to lift soil weighing 30N from the ground.
(a) Mark the direction of the least force on the handle necessary to keep the spade balanced.
(b) Calculate the least force on the handle necessary to keep the spade balanced (the weight of the spade is negligible).
(c) If the left hand was move towards the soil on the spade, would the force on the handle necessary to keep the soil balance the greater or less? Give a reason for your answer.
(d) To which class of lever does the spade belong?
Give an example where a machine is used to obtain gain in speed.
Classify the following as a lever, a pulley and an inclined plane:
A crane
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the first order.
Which machine will you use to do the following work? Write their type.
To draw water from a well.
Simple machines usually exchange a larger force to move a heavy object.
