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प्रश्न
State two factors on which moment of the force about a point depends.
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उत्तर
Moment of force depends on two factors:
(i) Magnitude of force applied.
(ii) Distance of line of action of the force from the axis of rotation.
संबंधित प्रश्न
Thrust is the ............ force acting on a surface.
SI. unit of moment of force is
The spanner (or wrench) has a long handle.
Classify the following amongst contact and non-contact force.
force of tension in a string
State the relationship between force, mass and acceleration. Draw graphs showing the relationship between Acceleration and mass for a constant force.
A rocket is moving at a constant speed in space by burning its fuel and ejecting out the burnt gases through a nozzle. Answer the following
1) Is there any change in the momentum of the rocket? if yes, what causes the change in momentum?
2) Is there any force acting on the rocket? if yes, how much?
Define couple.
Give an example of the following uses of a machine:
to change the direction of force
The diagram shows a uniform metre rule weighing 100gf, pivoted at its centre O. Two weights 150gf and 250gf hang from the point A and B respectively of the metre rule such that OA = 40 cm and OB = 20 cm. Calculate :
the difference of anticlockwise and clockwise moment
Assertion & Reasoning
- Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.
- Reason: The principle of conservation of momentum is valid if the external force on the system is zero.
