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प्रश्न
Name a machine to change the point of application of force ?
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उत्तर
To change the point of application of force: the wheel of a cycle is rotated with the help of a chain by applying the force on the pedal.
संबंधित प्रश्न
Two forces each of 5N act vertically upwards and downwards respectively on the two ends of a uniform metre rule which is placed at its mid-point as shown in the diagram. Determine the magnitude of the resultant moment of these forces about the midpoint.
State four ways in which machines are useful to us.
State the incorrect statement:
A force of 5 kgf is required to cut a metal sheet. A pair of shears used for cutting the metal sheet has its blades 5 cm long, while its handles is 10 cm long. What effort is needed to cut the sheet?
What is the purpose of a machine?
Give an example for each of the following uses of a machine:
to obtain gain in force,
Complete the following sentence :
Mechanical advantage = ___________ × velocity ratio
What is a machine?
Name a machine which can be used to multiply force and change the direction of force applied.
Mention the advantages of using a machine.
