Have you ever wondered why the sky is blue or how gravity functions? Physics is the field of study that explores the interactions of the fundamental elements of our universe. It plays a crucial role in the syllabus of various competitive exams for engineering and technical programs.
Physics encompasses a wide array of sub-disciplines, including quantum physics and nuclear physics. In this blog, we aim to present you with a complete list of essential physics formulas that will help you excel in your chosen competitive exam.
To truly grasp physics, it’s crucial to express real values instead of just memorizing them. When we engage with practical applications, we encounter a range of concepts, problems, and mathematical equations. Solving these requires us to apply our skills, creativity, and the right kind of potential. In essence, understanding physics goes beyond rote memorization; it involves actively using our abilities and imagination to find solutions.
Here are a few essential physics formulas to help you prepare for competitive exams.
List of Basic Physics Formulas | ||
Formula | Description | Formula |
Average Speed | Calculate the average speed of a moving object when you know the distance and time. | S = d/t |
Acceleration | Measure how quickly an object’s velocity changes over time. | a = (v – u)/t |
Density | Determine the denseness of a material in a given area. | P = m/V |
Power | Find the energy used to perform work over a specific time period. | P = W/t |
Newton’s Second Law | Expresses force as the product of mass and acceleration of an object. | F = ma |
Weight | Calculate the force of gravity acting on an object with mass ‘m’. | W = mg |
Pressure | Measure the amount of force applied per unit area. | P = F/A |
Ohm’s Law | Relate current (‘I’), voltage (‘V’), and resistance (‘R’) in electrical circuits. | V = I × R |
Kinetic Energy | Calculate the energy possessed by a moving object. | E = 1/2 mv² |
Frequency | Measure the number of cycles or revolutions completed per second. | F = v/λ |
Pendulum | Calculate the time it takes for a pendulum to swing back and forth. | T = 2π√(L/g) |
Fahrenheit Conversion | Convert temperature from Celsius to Fahrenheit. | F = (9/5 × °C) + 32 |
Work | Find the work done by multiplying force, displacement, and the cosine of the angle. | W = F × d × cosθ |
Torque | Measure the rotational force or turning effect. | T = F × r × sinθ |
Displacement | Calculate the change in an object’s position from initial to final position. | D = Xf – Xi = ΔX |
Mass-Force Relationship | Relate force (‘F’), mass (‘m’), and acceleration (‘a’) in Newton’s second law. | F = ma or m = F/a |
To succeed in competitive exams, it’s crucial to understand the syllabus and exam format. With so many applicants, getting a high score requires mastering all the details. Many candidates cover the main concepts, but what sets you apart is knowing the smaller, finer points.
While it’s essential to solidify your grasp of basic Physics formulas, don’t forget to review the fundamental principles in this subject. To assist you in strengthening your grasp of various Physics concepts, we’ve provided explanations for some frequently asked topics in this field.
Many engineering exams often include questions about SI units. It’s important to keep in mind these key points about SI units and how they relate to basic physics formulas. While SI units may seem less emphasized, they play a crucial role in various exam questions. Here are some important SI units to remember and use with your basic physics formulas.
SI Units | ||
Name of the Quantity | SI Unit | Name of the Unit |
Mass | Kilogram | Kg |
Time | Second | s |
Length | Metre | m |
Thermodynamic/ Temperature | Kelvin | K |
Electric Current | Ampere | A |
Luminous | Candela | Cd |
Amount of Substance | Mole | Mole |
Electric Resistance | Ohm | Ω |
Power | Watt | W |
Wavelength of Light | Angstrom | Å |
Magnetic Induction | Gauss | Gs |
Electric Charge | Coulomb | C |
Atmospheric Pressure | Bar | bar |
Energy | Joule | J |
Magnetic Flux | Maxwell | Mx |
Pressure | Pascal | Pa |
Force | Newton | N |
Many people are familiar with the common tools and gadgets used in physics experiments. These devices can be included in different questions to assess a student’s grasp of fundamental physics principles and equations. Below, we’ve listed these tools and devices along with simple explanations.
Important Instruments and Devices | |
Instrument | Function |
Speedometer | Measures and displays vehicle speed |
Accelerometer | Measures acceleration |
Dynamometer | Measures torque, force, and power |
Anemometer | Measures wind speed |
Galvanometer | Detects and indicates electric current |
Barometer | Calculates atmospheric pressure (used in meteorology) |
Viscometer | Determines fluid viscosity |
Seismometer | Measures earth’s movements due to earthquakes or volcanic eruptions |
Voltmeter | Measures electrical potential difference between two points |
Basic physics formulas are essential for solving problems in competitive exams related to engineering and technical programs. They provide a structured way to calculate physical quantities and help candidates demonstrate their understanding of fundamental physics concepts.
Understanding the underlying principles of physics allows candidates to apply the formulas effectively to various situations. It also helps them grasp the finer points of physics, which can be crucial in competitive exams that may test comprehensive knowledge.
SI (International System of Units) units are standardized units of measurement used in physics and engineering. They provide a consistent and globally accepted way to express physical quantities. Knowing SI units is crucial because they ensure clarity and accuracy when using physics formulas.
Common instruments and devices in physics experiments include speedometers, accelerometers, dynamometers, anemometers, galvanometers, barometers, viscometers, seismometers, and voltmeters. These tools serve various purposes in measuring physical phenomena.
Torque is calculated by multiplying the applied force by the perpendicular distance from the point of rotation. It's essential because it quantifies the rotational force or turning effect on an object, which is important in various mechanical applications.