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प्रश्न
The S.I. unit of force is kgf. (kilogram-force)
विकल्प
True
False
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उत्तर
False.
The S.I. unit of force is newton.
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संबंधित प्रश्न
How does the magnitude of this non-contact force on the two bodies depend on the distance of separation between them?
Where can a body execute free vibrations?
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?
Write the expression for the moment of force about a given axis of rotation.
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?.
The stone of hand flour grinder is provided with a handle near its rim. Give reason.
A spanner (or wrench) has a long handle. Why?
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
Calculate the length of arm of couple, if a force of 13 N produces a moment of couple of 14.3 Nm.
