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प्रश्न
Classify the following as a lever, a pulley and an inclined plane:
A crane
उत्तर
A crane – A pulley
संबंधित प्रश्न
Define the term ‘work input’ and ‘work output’ in relation to a machine.
A machine is 75% efficient’. What do you understand by this statement?
Give an example of the following uses of a machine:
to obtain gain in speed
Define Velocity Ratio
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?
What is the efficiency of an ideal machine?
Define mechanical advantage (M.A.) of the machine.
What is the relationship between the mechanical advantage and the velocity ratio for:
(i) An ideal machine,
(ii) A practical machine.
Classify the following as a lever, a pulley and an inclined plane:
An axe
Classify the following as a lever, a pulley and an inclined plane:
A knife
