JEE SHM Shortcuts
### Shortcut 1
At mean position:
$$v=v_{max}$$
$$a=0$$
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### Shortcut 2
At extreme position:
$$v=0$$
$$a=a_{max}$$
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### Shortcut 3
Time period of spring:
$$T=2\pi\sqrt{\frac{m}{k}}$$
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### Shortcut 4
Time period of pendulum:
$$T=2\pi\sqrt{\frac{l}{g}}$$
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### Shortcut 5
Energy remains constant:
$$K+U=constant$$