What is a contact force? Give some examples of it and explain why they are contact forces? [3 MARKS]
Answer: 1 Mark
Example: 1 Mark
Explanation: 1 Mark
Force applied by direct touching an object is called contact force. Like me pushing a wall i.e. muscular force or frictional force etc. All of them require contact for their application. You cannot push something without toching it. Friction will not act if two surfaces are not in contact.