NCERT · Class 8 · Science · FrictionWhy do machines wear out over time?
Step-by-Step Solution
Machines wear out over time primarily due to friction between their moving parts, which causes continuous material loss and generates heat.
Detailed Options Breakdown
Option : Due to gravity
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Friction.
Option 1: Due to friction (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Due to magnetism
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Friction.
Option 3: Due to air pressure
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Friction.
💡 Study Guide: This question tests core syllabus concepts from Friction. For formulas, key summaries, and mock exam reference guides, read the full Friction Revision Notes.