Advertisements
Advertisements
Question
State the condition when the change in the momentum of a body depends only on the change in its velocity.
Advertisements
Solution
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.
RELATED QUESTIONS
The S.I. unit of force is kgf. (kilogram-force)
How does the effect of force differ when it is applied on a non-rigid body?
State the S.I. unit of moment of force.
What is thrust?
State Newton's first law of motion. Why is it called the law of inertia?
A uniform metre rule of weight 10gf is pivoted at its 0 mark.
What moment of force depresses the rule?
Give an example for each of the following uses of a machine:
to change the point of application of force
Calculate the resultant moment of forces about O and state its direction in fig.

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.
The diagram shows wheel O pivoted at point A. Three equal forces F1, F2 and F3 act at point B on the wheel.

- Which force will produce maximum moment about A?
- Give a reason for your answer in (a).
