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प्रश्न
Which machine will you use to do the following work? Write their type.
To hold a papad for roasting it.
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उत्तर
To hold a papad for roasting, we should use a pair of tongs, which is a third-order lever.
संबंधित प्रश्न
Fill in the blank:
The useful work done by an actual machine is always ............ than the work done on the machine.
What is the principle on which a machine works?
Answer the following in short.
Mention any two methods by which we can take care of machines.
Give a reason for the following.
Machines are able to make our work convenient.
Define Velocity Ratio
Write an expression to show the relationship between mechanical advantage, velocity ratio, and efficiency for a simple 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 crane
What is a lever?
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.
