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प्रश्न
State one factor on which the magnitude of a non-contact force depends. How does the magnitude of a non-contact force change along with distance?
उत्तर
The magnitude of a non-contact force depends on distance. If the magnitude of a non-contact force increasing then distance decreasing.
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संबंधित प्रश्न
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?
How does the effect of force differ when it is applied on a non-rigid body?
Write the expression for the moment of force about a given axis of rotation.
A body X of mass 5 kg is moving with velocity 20 m s-2 while another body Y of mass 20 kg is moving with velocity 5 m S-1. Compare the momentum of the two bodies.
Give two examples of a couple's actions in our daily life.
Classify the following amongst contact and non-contact forces.
electrostatic force
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.
State whether the moment of force is a scalar or vector quantity?
The diagram in Fig shows two forces F1 = 5 N and F2 = 3 N acting at points A and B respectively of a rod pivoted at a point O, such that OA = 2 m and OB = 4 m.
Calculate:
- the moment of force F1 about O.
- the moment of force F2 about O.
- total moment of the two forces about O.
