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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
Answer the following in short.
Mention any two methods by which we can take care of machines.
The correct relationship between the mechanical advantage (M.A.), the velocity ratio (V.R.) and the efficiency (n) is ______.
What is an inclined plane?
Can a machine be 100% efficient?
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?
Write an expression for the mechanical advantage of an inclined plane.
What is the efficiency of a machine?
Establish a relationship between efficiency, M.A., and V.R.
Classify the following as a lever, a pulley and an inclined plane:
Scissors
