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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
The wheel of a flagpole
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उत्तर
The wheel of a flagpole – A pulley
संबंधित प्रश्न
What is the principle on which a machine works?
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 .
What is an ideal machine?
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?
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the second order.
The ______ in the centre, the ______ on one side and the ______ on the other side make a lever of the third order.
Identify and mention the types of simple machines.
 |
 |
 |
| ______ | ______ | _______ |
 |
 |
 |
| ______ | ______ | ______ |
Rearrange the letters and find out the name of the tool.
R L E V E
| ______ | ______ | ______ | ______ |
The idea of a simple machine originated with the Greek philosopher Archimedes.
