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प्रश्न
What is the purpose of a jack in lifting a car by it?
उत्तर
The purpose of jack is to make the effort less than the load so that it works as a force multiplier.
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संबंधित प्रश्न
Answer the following.
What do you understand by a complex machine?
Give two examples of inclined plane where it is used to raise a heavy load with less effort ?
Define mechanical advantage (M.A.) of the machine.
(i) Calculate the mechanical advantage of the lever shown in the figure.
(ii) How do you define the mechanical advantage of a machine?
A uniform metre scale is kept in equilibrium when supported at the 60 cm mark and a mass M is suspended from the 90 cm mark as shown in the figure. State with reasons, whether the weight of the scale is greater than, less than or equal to the weight of mass M.
Classify the following as a lever, a pulley and an inclined plane:
A wedge
Classify the following as a lever, a pulley and an inclined plane:
Nutcrackers
Classify the following as a lever, a pulley and an inclined plane:
A crane
______ help us to make work easier.
Name a machine for each of the following uses:
- to multiply the force,
- to change the point of application of force,
- to change the direction of force,
- to obtain the gain in speed.
