Name: Rolling and Sliding Friction
Uploaded: 2019-07-19
Duration: 5 min 50 s
Description: Do you know that wheels are considered one of the greatest inventions of mankind? In this video, we will learn what makes a wheel so special. Watch and learn.

Question

Differentiate between the contact forces and non-contact forces.

Accepted Answer

All forces in nature are broadly categorized into contact forces and non-contact forces. Contact forces require physical contact between the object and the person or thing applying the force while non-contact forces do not require any physical contact between the concerned objects. The difference between the contact forces and non-contact forces are:

Contact forces Non-contact force

Contact force occurs due to the contact between two different objects. Non-contact force occurs due to either attraction or repulsion between two objects such that there is no contact between these objects.

There is no field linked with the contact force. There is always a field linked with non-contact force.

The frictional force is an example of a contact force. Gravitational force is an example of a non-contact force.

Differentiate between the contact forces and non-contact forces.

Important Questions on Force

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