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Question
Name the factors affecting the turning effect of a body
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Solution
The following are the factors which affect the turning effect of a body:
- The magnitude of the force applied
- A distance of line of action of the force from the axis of rotation
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RELATED QUESTIONS
Match the column
| Column A | Column B |
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| (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 |
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How does the effect of force differ when it is applied on a rigid body?
On what factors does the effect of thrust on a surface depend?
State one way to obtain greater moment of a given force about a given axis of rotation.
Name of S.I. unit of momentum.
A, B and C are the three forces each of magnitude 4 N acting in the plane of the paper as shown in Figure. The point O lies in the same plane.
- Which force has the least moment about O? Give a reason.
- Which force has the greatest moment about O? Give a reason.
- Name the forces producing
(a) Clockwise
(b) anticlockwise moments. - What is the resultant torque about the point O?
Classify the following amongst contact and non-contact forces.
Frictional force
State when the moment of force is positive and when it is negative.
What is meant by the term ‘moment of force’? If the moment of force is assigned a negative sign then will the turning tendency of the force be clockwise or anti-clockwise?
Assertion & Reasoning
- Assertion: The sum of the clockwise moments is equal to the sum of the anticlockwise moments.
- Reason: The principle of conservation of momentum is valid if the external force on the system is zero.
