 # Basic Physics Formulas and Notes For Competitive Exams 2023 Posted by

Basic Physics Formulas and Notes For Competitive Exams: Ever wonder how gravity operates or why the sky is blue? The main focus of physics is on the interactions between the building blocks of the cosmos.

This topic, which includes a wide variety of sub-fields from nuclear physics to quantum physics, is a crucial component of the syllabus for many competitive tests held for admission to engineering and technical programs.

This article attempts to provide you with a thorough rundown of all the fundamental basic physics formulas and notes for competitive exams you need to be familiar with in order to ace your chosen competitive exam.

## List of basic physics formulas and notes for competitive exams

Here are some basic physics formulas and notes for competitive exams

### 1. Average Speed Formula

This is one of the basic physics formulas and notes for competitive exams. It is used to calculate the average speed (S) of a moving body for the distance covered (D) as well as the time duration (T).  S = d/t

### 2. Acceleration Formula

This is also one of the basic physics formulas and notes for competitive exams. Acceleration refers to the rate of change in velocity to the change in time. It is denoted by symbol a.  a =(v-u)/t

### 3. Density Formula

This is one of the basic physics formulas and notes for competitive exams. This formula depicts the denseness of material in a specific given area.  P=m/V

### 4. Power Formula

This is also one of the basic physics formulas and notes for competitive exams. The capacity to perform an activity is known as Energy. On the other hand, energy spent in carrying out an activity (work) for a particular period of time is termed as Power.  P=W/t

### 5. Newton’s Second Law

This is one of the basic physics formulas and notes for competitive exams. Using the formula, the force can be expressed by the product of mass and acceleration of the body.   F = ma

### 6. Weight Formula

The formula measures the force with which an object falls due to gravity.  W=mg

### 7. Pressure Formula

Pressure refers to the amount of force applied per unit area of the object.  P=F/A

### 8. Ohm’s Law Formula

This is one of the basic physics formulas and notes for competitive exams. Ohm’s law states that the current passing through a conductor material is directly proportional to the potential difference between two endpoints of the conductor.  V= I × R

### 9. Kinetic Energy Formula

Kinetic energy is the energy that is possessed by a body due to its state of motion.  E = 1/2 mv²

### 10. Frequency Formula

This is one of the basic physics formulas and notes for competitive exams. Frequency refers to the revolutions completed per second or as the number of wave cycles.  F =v/λ

### 11. Pendulum Formula

This is as well one of the basic physics formulas and notes for competitive exams. This equation calculates how long the pendulum takes swing back and forth in seconds T = 2π√Lg

### 12. Fahrenheit Formula

This is one of the basic physics formulas and notes for competitive exams. This is a conversion formula for a temperature. F = (9/5× °C) + 32

### 13. Work Formula

This is one of the basic physics formulas and notes for competitive exams. The work formula measures the multiplication of magnitude of displacement d and the component of the force.  W = F × d × cosθ

### 14. Torque Formula

This is one of the basic physics formulas and notes for competitive exams. Torque is rotational force or turning effect. It measures the magnitude of  T = F × r × sinθ

### 15. Displacement Formula

This is one of the basic physics formulas and notes for competitive exams. Refers to the change in the object’s position from its initial place to its final position. D = Xf–Xi = ΔX

### 16. Mass Formula

This is also one of the basic physics formulas and notes for competitive exams. This formula represents the relationship between force and mass. Here, F = force, m = mass, and a = acceleration. F = ma or m = F/m

## Popular basic physics formulas and notes for competitive exams

### Average Speed Formula

Using this Physics formula, we can calculate the average speed (S) of a moving body for the distance covered (D) as well as the time duration (T).

### Density Formula

This formula depicts the denseness of material in a specific given area.

### Acceleration Formula

Acceleration is the rate of change velocity with respect to the change in time.

### Power Formula

The capacity to perform an activity is known as Energy. On the other hand, energy spent in carrying out an activity (work) for a particular period of time is termed as Power.

### Pressure Formula

The amount of force applied per unit of an area is referred to as the pressure of an object.

### Ohm’s Law Formula

Amongst the popular Physics formulas, the Ohm’s Law is explained as the current (I) passing through some conductor material is directly proportional to the potential difference (V) between the two endpoints of the conductor.

## Notes on Basic Physics Formulas

It is crucial to become familiar with the syllabus and exam format in order to succeed in any competitive exam. One cannot dispute the truth that learning the nuances on your suggestions is necessary to obtain a tempting score given the large quantity of applicants each year.

Most of the time, everyone prepares the key ideas, but understanding the finer points of the subjects is what earns extra points.

While it’s important to brush up on your fundamental Basic physics formulas, it’s also crucial to review the subject’s core ideas. We have covered some of the frequently asked questions in the field of physics in order to aid you in strengthening the many ideas covered.

## SI Units

In a lot of engineering exams, questions about the SI unit are regularly posed. In addition to the above-mentioned fundamental physics formulas, the following are the main points you need to keep in mind regarding SI units.

However, despite the fact that the idea of SI units is given less weight, they are frequently used in test question papers. Here are some key SI that you need to apply to your fundamental physics formulas and keep in mind.

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

Link To Basic Physics Formulas Website

## Important Equipment and Instruments

The majority of us only have a basic understanding of the tools or equipment utilized in different physics investigations.

To assess a student’s comprehension of fundamental physics ideas and formulas, these instruments can be included into a variety of questions.

Check out the list of these tools and gadgets below, along with their distilled definitions.

Instruments                                                     Functions
Speedometer                                       A device used to measure and display the speed of a vehicle.

Accelerometer                                      It is a device that measures acceleration

Dynamometer                                      Usually, this device is used for measuring the torque, force                                                              as well as the power of a body.

Anemometer                                        Through this device, we can measure the speed of the wind.

Galvanometer                                      It is an electromechanical instrument which is utilised for                                                                detecting and indicating the electric current.

Barometer                                           A barometer is a scientific instrument which has its                                                                        application in meteorology and is used to calculate the                                                                    atmospheric pressure.

Viscometer                                          Through this device, we can calculate the viscosity of a fluid.

Seismometer                                        This instrument helps in assessing and measuring the                                                                     random motions inside the earth’s crust caused by an                                                                     earthquake or volcanic eruption etc.

Voltmeter                                              By using a voltmeter, we can measure the electrical                                                                        potential difference between two given points

## Questions to Ponder On basic physics formulas and notes for competitive exams

1. A door is 40 centimeters wide. In the event that it is freed by applying a 2 N force on its edge (away from the hinges). The torque that opens the door should be calculated.
2. The 4 meters of a pendulum. Each cycle takes 0.25 seconds to finish in full. The pendulum bob can swing out 0.1 meters from the center at its maximum distance. determine the oscillation’s time frame? What is the displacement at the end of 0.6 seconds?
3. The period of a pendulum on Earth is 1.90 second. What is its period on Mars, when the Earth’s gravitational acceleration is only around 0.37 times that of Mars?
4. Let’s imagine a man driving a lawnmower over a grass while exerting effort on the handle that is slanted downward at a 60-degree angle from the horizontal plane. On top of that, the force is 900 N strong. Thus, suppose he pushes the mower 30 meters. Next, determine the amount of effort required to move the lawnmower by the individual.
5. At 50 Hz, a wave has frequency. Moreover, it has a 10 m wavelength. How fast is the wave, exactly?
6. Consider the scenario where Geeta travels from Delhi to see Rohit. 350 kilometers to the north are traveled by her rail trip. After then, for 125 kilometers, the railway reverses direction. Using the displacement formula, what is Geeta’s total displacement?
7. On the ground lies a box with a resting mass of 250 N. Over what area is the box in contact with the floor if the pressure it exerts on the floor is 25,000 Pa?
8. One kilogram is the mass of the thing. Additionally, it is subject to a 2 Newton force. Analyze the object’s acceleration to determine its size and direction.
9. A person weighs about 70 kg, and the Earth’s gravity is 9.8 m/s2. How much does this individual weigh?
10. Calculate the gravitational force acting on two objects with mass differences of 15 g and 15 kg and a distance of 11 m.