JEE Important Shortcuts

JEE Important Shortcuts

### Shortcut 1

Work done by perpendicular force:

$$W=0$$

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### Shortcut 2

For uniform circular motion:

$$W_{net}=0$$

because:

$$\vec{F}\perp\vec{s}$$

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### Shortcut 3

Mechanical energy conservation:

$$K_i+U_i=K_f+U_f$$

only when:

$$W_{nc}=0$$

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### Shortcut 4

Power relation:

$$P=Fv$$

is valid only when:

$$\theta=0^\circ$$

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### Shortcut 5

Spring energy depends on square of displacement:

$$U\propto x^2$$