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Q.

Which of the following is/are contact forces:



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a

Normal force

b

Tension force

c

Friction force

d

All 

answer is D.

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Detailed Solution

Concept- In order to answer this question, we must first define contact. A contact force is a force that occurs when two objects make contact. Then we look at the various contact forces that are present, which include externally applied force, frictional force, spring force, air resistance, and tension force. As a result, all three options are correct. Contact forces and non-contact forces are the two types of forces. A contact force is a force that occurs when two objects make contact. Contact forces exist everywhere and are responsible for the majority of visible interactions between different objects and surfaces. Contact force is used in everyday situations such as hitting a ball with a cricket bat or pulling a trolley up a hill. Force is delivered in a short burst in the first scenario, whereas force is continuously applied by the person on the trolley to pull it in the second. Contact forces are typically divided into two orthogonal components: one parallel to the surface in contact, known as friction, and one perpendicular to the surface in contact, known as a normal force. Figureclearly shows these details.
Question ImageExternally applied force, friction, spring force, air resistance, and tension force are examples of contact forces. As a result, option 4 is correct. A non-contact force is one that acts on a body without physically touching it. Gravitational force, electromagnetic force, and nuclear forces, both strong and weak, are examples of non-contact forces.
Hence, option 4 is the correct answer.
 
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