Contact force is a force that acts only when there is a physical contact between two body. Identify the contact force among the following?
رابطہ فورس ایک ایسی قوت ہے جو صرف اس وقت کام کرتی ہے جب دو جسم کے مابین جسمانی رابطہ ہو۔ مندرجہ ذیل میں رابطے کی قوت کی شناخت کریں؟
Answer: Upthrust of liquid
Explanation
Upthrust (or buoyant force) happens only when a body is physically in contact with a liquid.
Electrostatic magnetic force between two magnets, and gravitational forces act at a distance without contact.
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