Class 11 | Physics | chapter 1 | Physical World,Formula Sheets

Ruhul Amin Alig

All the formulas in one go

1

Fundamental Forces in nature

Gravitational Force: $F = \frac{G m _{1} m _{2}}{R ^{2}}$ where G is the gravitational constant, $m_{1}$ and $m_{2}$ are the mass of the stationary bodies and $R$ is the separation between the two stationary bodies

Electromagnetic Force: $F = q E + q (V \times B)$ Here, the force exerted on a charged particle $q$ moving with velocity $v$ through an electric field $E$ and magnetic field $B$ .

Strong Nuclear Force:

Weak Nuclear Force:

Below table shows difference between the above forces.

2

Conservation Laws

Law of conservation of Energy: $Σ E n e r g y_{Enter the System} = Σ E n e r g y_{Exit the System}$

Law of conservation of Mass: This is a principle used in analysis of chemical reactions. Mass is related to energy through Einstein theory, $E = m c^{2}$

Law of conservation of linear momentum: $m_{1} V_{1} = m_{2} V_{2}$ here, $m_{1}, V_{1}$ and $m_{2}, V_{2}$ are the mass and velocity of the colliding bodies before and after the collision respectively.

Law of conservation of angular momentum: $I_{1} ω_{1} = I_{2} ω_{2}$ here, $I_{1}, ω_{1}$ and $I_{2}, ω_{2}$ are the moment of inertia and angular velocity of the colliding bodies before and after the collision respectively.

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Class 11 | Physics | chapter 1 | Physical World Formula Sheets Formula Sheets | Physics | NEET

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