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प्रश्न
Define force.
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उत्तर
Force is a physical cause that changes or may tend to change the state of rest or the state of motion of an object.
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संबंधित प्रश्न
What is the SI unit of the moment of force?
A force always produces both the linear and turning motions.
Thrust is the ............ force acting on a surface.
How does the effect of force differ when it is applied on a rigid body?
State the S.I. unit of moment of force.
In Fig. a force F is applied in a direction passing through the pivoted point O of the body. Will the body rotate? Give reason to support your answer.
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
State Newton's first law of motion. Why is it called the law of inertia?
Name and define the S.I. and C.G.S. units of force. How are they related?
A body is acted upon by two forces of magnitude F but in opposite directions. State the effect of the force if both forces act at the same point of the body.
The moment of a force about axis depends ______.
The diagram shows two forces F1 = 5 N and F2 = 3N acting at point A and B of a rod pivoted at a point O, such that OA = 2m and OB = 4m
Calculate:
- Moment of force F1 about O
- Moment of force F2 about O
- Total moment of the two forces about O.
Classify the following amongst contact and non-contact forces.
normal reaction force,
Classify the following amongst contact and non-contact forces.
electrostatic force
Define couple.
Fig. shows a uniform meter scale weighing 100 N pivoted at its centre. Two weights of 500 N and 300 N are hung from the ruler as shown in fig.
(i) Calculate total clockwise and anticlockwise moments.
(ii) Calculate difference in clockwise moment and anticlockwise moment.
(iii) Calculate the distance from O where a 100 N weight should be suspended to balance the meter scale.
A meter scale is provided at 10 cm mark and is balanced by suspending 400 g from 0 cm mark (fig.). Calculate the mass of meter scale.
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 total clockwise moment about O
Give any two effects of a force on a non-rigid body.
