JEE Main Physics question

Physics Laws of Motion JEE Main

**Statement I:** It is easier to pull a heavy object than to push it on a level ground. **Statement II:** The magnitude of frictional force depends on the nature of the two surfaces in contact.

(A)Statement I is true, Statement II is true; Statement II is a correct explanation for Statement I
(B)Statement I is true, Statement II is true; Statement II is not a correct explanation for Statement ICorrect
(C)Statement I is true, Statement II is false
(D)Statement I is false, Statement II is true

Answer: (B)

Solution

Pulling an object (force applied upward-and-forward) reduces the normal force, hence reduces friction, making it easier than pushing (which increases the normal force) — so Statement I is true. Statement II is also a true general fact about friction, but it explains why friction VARIES

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Question ID VK-153512