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प्रश्न
State the condition when the change in the momentum of a body depends only on the change in its velocity.
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उत्तर
If the mass of the body m remains constant then the change in momentum of the body depends only on the change in its velocity.
संबंधित प्रश्न
A force always produces both the linear and turning motions.
Match the column
| Column A | Column B |
| (a) Camel | (1) broad and deep foundation |
| (b) Truck | (2) broad feet |
| (c) Knife | (3) six or eight tyres |
| (d) High building | (4) sharp cutting edge |
| (e) Thrust | (5) atm |
| (f) Moment of force | (6) N |
| (g) Atmospheric pressure | (7) N m |
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.
Write the expression for the moment of force about a given axis of rotation.
A potter turns his wheel by applying a force through the stick near the rim of wheel.
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.
gravitation force
A wheel of diameter 3 m is shown in fig. 2 with axle at 0. A force F = 8 N is applied at Q in the direction shown in figure. Calculate the moment of force about:
(i) centre o, and
(ii) point p.
State the effects that a force can produce. Given one example of each.
Write the expression for calculating the moment of force about a given point.
