Q. Which of these is a non-conservative force?

इनमें से कौन गैर-रूढ़िवादी शक्ति है?

A
Gravity
गुरुत्वाकर्षण
B
Spring force
स्प्रिंग बल
C
Electrostatic force
विद्युत बल
D
Friction
टकराव

Explanation

Friction is a non-conservative force because the work done by friction depends on the path taken and dissipates mechanical energy as heat. Gravity, spring, and electrostatic forces are conservative forces, meaning work done is path-independent and energy is conserved.

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