Work and Energy

This original revision companion supports the official NCERT book; it does not replace it.

Focus

Use direction and displacement to decide work, then compare kinetic and potential energy.

Common mistake

Force without displacement does not automatically mean work is done in physics.

10-minute routine

1. Read the matching section in the official NCERT book ↗.
2. Write three key ideas without looking.
3. Take the Class 9 practice quiz ↗.
4. Check your score in My Practice ↗.

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