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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
A force is applied on (i) a non-rigid body and (ii) a rigid body. How does the effect of the force differ in the above two cases?
A half metre rod is pivoted at the centre with two weights of 20gf and 12gf suspended at a perpendicular distance of 6 cm and 10 cm from the pivot respectively as shown below.
1) Which of the two forces acting on the rigid rod causes clockwise moment?
2) Is the rod in equilibrium?
3) The direction of 20 kgf force is reversed. What is the magnitude of the resultant moment of the forces on the rod?
Less force is needed when applied at a farther distance from the pivoted point.
In a door, handle is provided ......... from the hinges.
SI. unit of moment of force is
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.
A spanner of length 10 cm is used to open a nut by applying a minimum force of 5.0 N. Calculate the moment of force required.
Name and define the S.I. and C.G.S. units of force. How are they related?
A spanner (or wrench) has a long handle. Why?
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.
A nut is opened by a wrench of length 10 cm. if the least force required is 5.0 N. find the moment of force needed to turn the nut.
The diagram in the figure shows a uniform metre rule weighing 100 gf, pivoted as its centre O. two weight 150 gf and 250 gf hang from the point A and B respectively of the metre rule such that OA = 40 cm and OB = 20 cm . Calculate
the total anticlockwise moment about o.
Classify the following amongst contact and non-contact forces.
Frictional force
Classify the following amongst contact and non-contact forces.
magnetic force
Define non-contact forces.
How does the distance of separation between two bodies affect the magnitude of the non-contact force between them?
State the effects that a force can produce. Given one example of each.
A uniform metre rule rests horizontally on a knife-edge at the 60 cm mark when a mass of 10 gram is suspended from one end. At which end must this mass be suspended? What is the mass of the rule?
The perpendicular distance between the point of application of force and turning point is 1.75 m when a force of 80 N acts on a rigid body. Calculate the moment of force.
Clockwise moment produced by a force about a fulcrum is considered to be ______.
