6. Differentiate between contact and non-contact forces with examples. Also, explain fundamental forces and discuss the role of Dr. Abdus Salam from Pakistan in unifying two fundamental forces.



Answer :

Final answer:

Contact forces involve objects in direct contact, while non-contact forces act at a distance. Fundamental forces govern interactions in nature, and Dr. Abdus Salam contributed to unifying two fundamental forces.


Explanation:

Contact forces are forces that occur between objects in contact, such as tension, friction, normal force, and the force of a spring. On the other hand, non-contact forces act at a distance without direct contact, like gravitational and electromagnetic forces. Fundamental forces include gravitational, electromagnetic, weak nuclear, and strong nuclear forces, which govern interactions in nature. Dr. Abdus Salam was a Pakistani physicist who played a prominent role in unifying electromagnetism and weak nuclear force, forming the basis of the electroweak theory.


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