# Frequently used basic physics equations

This Article is about frequently used . I have covered most of physics equations for class 11 and 12. Earlier I had made a physics formula diary  which has been available for free download.  Now this is little bit detailed in nature and there are the times when you study and you want most of your formulas in a page or two. This is a Frequently used physics equations guide which you can print out and stick in front of your study desk for easy reference. You can use this for easy reference of formulas while solving physics problems.

## 1. Kinematics

These links give the detailed notes on the respective chapters

### Instantaneous velocity and speed

Instantaneous speed or speed is the magnitude of the instantaneous velocity

here is the displacement of the object and has only one component(out of x, y and z) for motion along straight line and has two components for motion in a plane.

### AccelerationAverage acceleration

Instantaneous acceleration

### Projectiles

Horizontal distance

Horizontal velocity

Vertical distance

Vertical velocity

Here,
is the velocity along x-axis,
is the initial velocity along x-axis,
is the velocity along y-axis,
is the initial velocity along y-axis.
is the acceleration due to gravity and
is the time taken.

Time of flight

Maximum height reached

Horizontal range

Here,

is the initial Velocity,
is the component along y-axis,
is the component along x-axis.

### Uniform circular motion

Angular velocity

where  is angle moved in radian’s

Relation between linear velocity, angular velocity and radius of circular motion

Angular acceleration

Centripetal acceleration

## 2. Laws of motion and friction

Links to Full length notes on these chapters are given below

### Limiting friction

where is the normal contact force and  coefficient of static friction.

## 3. Work energy and power

Full notes on Work energy and power

### Work

work done by the force F in in displacing the body through displacement d

### 4. Impulse and Momentum

This link have Impulse and linear momentum notes.

Momentum

Impulse

## 5. System of Particles and Collisions

Links to detailed notes on this chapter

### Inelastic collision

While colliding if two bodies stick together then speed of the composite body is

### Elastic collision in one dimension

Final velocities of bodies after collision are

also

## 6. Rotational Mechanics

Rotational mechanics notes

Angular Velocity

Angular acceleration

Angular momentum of system of particles about the origin

torque or moment of force on system of particles about the origin

Equations of rotation

Moment of inertia

Kinetic energy of rotation

## Gravitation

Universal gravitation

Orbital speed

escape speed

Acceleration due to gravity

(1) at height above the surface of earth

(2) at depth below earth’s surface

Gravitational potential energy

I really want to share this article with you people but this is not complete. Anyway I am posting it but will be completing it later on. In the mean time you can check these links for other downloads

Note
Also there is a good article on
How to do the physics problems