MHT-CET Physics · Teaching notes

Mechanical Properties of Solids — MHT-CET Physics

Mechanical Properties of Solids has only 6 past-year questions in the MHT-CET bank, one of them HARD, and all six are about stored and released energy. Four are springs — the energy a stretch stores, springs cut or joined in a chain, a ball dropped onto a spring-mounted platform — and two follow an impact, the rebound of a ball and the heat from a bullet that stops. Every PYQ is tagged.

Every subtopic, worked example, formula and trap in one printable document — answers shown, ready to share.

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Subtopic notes

Springs and Elastic Energy
6 PYQs
A spring stretched by x pulls back with kx and stores ½kx²; its constant grows as it is cut shorter, springs in series add their extensions, and energy conservation links a falling body to the compression it produces.

Formula & revision sheet

2 formulas · 3 gotchas across all subtopics — the exam-eve cheat-sheet

Springs and Elastic Energy

Formulas (2)

Spring Constant, Series Springs and Elastic Energy · Springs $F = kx, \qquad U = \tfrac{1}{2}kx^2, \qquad k \propto \frac{1}{L}$
Rebounds and Heat From an Impact · Impact $v_{\text{rebound}} = e\sqrt{2gh}, \qquad \Delta T = \frac{fV^2}{2Js}$

Watch out for (3)

Thinking a shorter spring is softer
→ Spring Constant, Series Springs and Elastic Energy
Leaving out the compression in the drop height
→ Spring Constant, Series Springs and Elastic Energy
Applying e to the height
→ Rebounds and Heat From an Impact

PYQ weightage by concept

2 concepts · 6 PYQs — where the marks actually sit, so you know what to drill first

Springs and Elastic Energy6 PYQs · 100%

Concept	PYQs	Share
Spring Constant, Series Springs and Elastic Energy	4	67%
Rebounds and Heat From an Impact	2	33%

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