Physics
State one factor on which the magnitude of a non-contact force depends. How does it depend on the factor stated by you?
Answer
The magnitude of non - contact forces between two bodies depends on the distance of separation between them.
It decreases with the increase in separation and increases as the separation decreases. It's magnitude varies inversely as the square of distance of separation i.e., on doubling the separation, the force becomes one fourth.
Related Questions
Classify the following amongst contact and non-contact forces —
(a) frictional force, (b) normal reaction force, (c) force of tension in a string, (d) gravitational force, (e) electrostatic force, (f) magnetic force.
Give one example in each case where —
(a) the force is of contact, and
(b) force is at a distance.
The separation between two masses is reduced to half. How is the magnitude of gravitational force between them affected?
Give one example in each of the following cases where a force —
(a) stops a moving body.
(b) moves a stationary body.
(c) changes the size of a body.
(d) changes the shape of a body.