Physics is a vital part of the NDA 2025 exam, requiring conceptual understanding and formula application. Here's a compilation of key formulas presented in a clear, organized format to help you prepare effectively.
1. Motion in Physics
|
S.No. |
Concept |
Formula |
|
1 |
Equation of Motion (1) |
v = u + at |
|
2 |
Equation of Motion (2) |
s = ut + (1/2)at2 |
|
3 |
Equation of Motion (3) |
v2 = u2 + 2as |
|
4 |
Average Velocity |
vavg = (u + v) / 2 |
|
5 |
Displacement |
s = vavg × t |
2. Relative Motion
|
S.No. |
Concept |
Formula |
|
1 |
Relative Velocity |
vAB = vA - vB |
|
2 |
Relative Displacement |
sAB = sA - sB |
3. Newton's Laws of Motion
|
S.No. |
Concept |
Formula |
|
1 |
Force |
F = ma |
|
2 |
Momentum |
p = mv |
|
3 |
Impulse |
J = FΔt = Δp |
|
4 |
Frictional Force |
f = μN |
4. Work, Energy, and Power
|
S.No. |
Concept |
Formula |
|
1 |
Work Done |
W = Fd cosθ |
|
2 |
Kinetic Energy |
KE = (1/2)mv2 |
|
3 |
Potential Energy |
PE = mgh |
|
4 |
Power |
P = W/t = Fv |
|
5 |
Work-Energy Theorem |
W = ΔKE |
5. Gravitation
|
S.No. |
Concept |
Formula |
|
1 |
Gravitational Force |
F = G(m1m2) / r2 |
|
2 |
Gravitational Potential Energy |
U = -G(m1m2) / r |
|
3 |
Acceleration Due to Gravity |
g = GM / R2 |
|
4 |
Orbital Velocity |
vo = √(GM / r) |
|
5 |
Escape Velocity |
ve = √(2GM / R) |
6. Circular Motion
|
S.No. |
Concept |
Formula |
|
1 |
Angular Velocity |
ω = θ / t |
|
2 |
Linear Velocity |
v = rω |
|
3 |
Centripetal Force |
Fc = mv2 / r |
|
4 |
Centripetal Acceleration |
ac = v2 / r |
|
5 |
Period of Revolution |
T = 2πr / v |
7. Thermodynamics
|
S.No. |
Concept |
Formula |
|
1 |
First Law of Thermodynamics |
ΔQ = ΔU + ΔW |
|
2 |
Work Done in Isothermal Process |
W = nRT ln(V2/V1) |
|
3 |
Work Done in Adiabatic Process |
W = (P1V1 - P2V2) / (γ - 1), γ = Cp/Cv |
|
4 |
Efficiency of Heat Engine |
η = 1 - T2/T1 |
|
5 |
Specific Heat Capacity |
Q = mcΔT |
8. Electric Current
|
S.No. |
Concept |
Formula |
|
1 |
Ohm’s Law |
V = IR |
|
2 |
Resistance in Series |
Rs = R1 + R2 + R3 + ... |
|
3 |
Resistance in Parallel |
1/Rp = 1/R1 + 1/R2 + ... |
|
4 |
Power in Electric Circuits |
P = VI = I2R = V2/R |
|
5 |
Joule’s Law of Heating |
H = I2Rt |
|
6 |
Current Density |
J = I/A |
|
7 |
Drift Velocity |
vd = I / nAe |
9. Heat and Temperature
|
S.No. |
Concept |
Formula |
|
1 |
Heat Transfer |
Q = mcΔT |
|
2 |
Heat Conducted (Fourier’s Law) |
Q/t = kAΔT/d |
|
3 |
Thermal Expansion |
ΔL = L0αΔT, ΔA = A0βΔT, ΔV = V0γΔT |
|
4 |
Stefan-Boltzmann Law (Radiation) |
P = σeAT4 |
|
5 |
Newton’s Law of Cooling |
dT/dt = -k(T - Tsurrounding) |
These formulas are crucial for solving physics questions in the NDA exam. Practice applying them to problems to strengthen your understanding and speed.
Tips for Preparation:
- Memorize these formulas with their proper contexts.
- Practice numerical problems to gain confidence in applying them.
- Revise concepts like laws of thermodynamics, resistance, and heat transfer regularly.
These formulas are your tools to solve various physics problems in the NDA 2025 exam.
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