Question

Define force. Describe with suitable examples, the contact and noncontact
(or action-at-distance) force.

Answer 1

Force is defined as a push or pull which can make an object change it's direction, deform or move from rest to motion or vice - versa.

Examples of force:-

Contact:-

1. Frictional force
2. Muscular force
3. Elastic force

Non - contact:- (action-at-a-distant-force)

1. Gravitational force
2. Nuclear force
3. Magnetic force
4. Electrostatic force.

More about force:-

1. Force is also defined as the "rate of change of momentum" or "product of mass and acceleration".
2. It is given by, $F = ma$.

Answer 2

Force is defined as an external cause which changes or tends to change the state of rest or uniform motion or state of strain of a body

Contact forces-

. Muscular force

. Collision force

. Mechanical force

. Tension

Non- contact forces-

. Magnetic force

. Electrostatic force

. Gravitational force

.Weight