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प्रश्न
State the incorrect statement:
विकल्प
A machine always has efficiency less than 100%.
The mechanical advantage of a machine can be less than 1.
A machine can be used as speed multiplier.
A machine can have the mechanical advantage greater than the velocity ratio.
उत्तर
A machine can have the mechanical advantage greater than the velocity ratio.
Reason:
If the mechanical advantage of a machine is greater than its velocity ratio, then it would mean that the efficiency of a machine is more than 100%, which is practically not possible.
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संबंधित प्रश्न
With reference to the terms Mechanical Advantage, Velocity Ratio and efficiency of a machine, name and define the term that will not change for the machine of a given design.
Draw a diagram to show how a single pulley can be used so as to have its ideal M.A= 2.
Name a machine to multiply force ?
Name a machine to change the point of application of force ?
Stat the principle of an ideal machine.
Shows a lemon crusher.
- In the diagram, mark the position of the fulcrum F and the line of action of load L and effort E.
- Name the class of lever
Complete the following sentence :
Mechanical advantage = ___________ × velocity ratio
Complete the following sentence :
A scissors is a ___________ multiplier.
Name a machine which can be used to multiply force and change the direction of force applied.
Mention the advantages of using a machine.
