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प्रश्न
______ help us to make work easier.
पर्याय
Ramp
Simple machines
Work
Energy
Pulley
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उत्तर
Simple machines help us to make work easier.
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संबंधित प्रश्न
Define the term ‘work input’ and ‘work output’ in relation to a machine.
Derive the relationship between mechanical advantage, velocity ratio and efficiency of a machine.
The correct relationship between the mechanical advantage (M.A.), the velocity ratio (V.R.) and the efficiency (n) is ______.
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?
Give an example of the following use of a machine to change the point of application of the force.
What is the efficiency of a machine?
Classify the following as a lever, a pulley and an inclined plane:
A needle
Classify the following as a lever, a pulley and an inclined plane:
Nutcrackers
Why is this so traveller’s bags have wheels?
