- v=u+at.
- s=ut+12×at2.
- 2as=v2−u2.
- Force: F=ma.
- v=u+gt.
- h=ut+12×gt2.

Table of Contents

## What is motion Class 9 formula?

The three equations are, v = u + at. v² = u² + 2as. s = ut + ½at²

## What is the formula of work in physics class 9?

Work done on an object is defined as the magnitude of the force multiplied by the distance moved by the object in the direction of the applied force. 1 Joule = 1 Newton × 1 metre.

## What are the 3 formulas for force?

- a = v/t.
- F = mv/t.
- F = p/t = dp/dt.

## What is the SI unit of force?

The SI unit of force is the newton, symbol N. The base units relevant to force are: The metre, unit of length — symbol m. The kilogram, unit of mass — symbol kg. The second, unit of time — symbol s.

## Is physics easy or hard?

Students and researchers alike have long understood that physics is challenging. But only now have scientists managed to prove it. It turns out that one of the most common goals in physics—finding an equation that describes how a system changes over time—is defined as “hard” by computer theory.

## What are the 4 equations of motion?

The equations are as follows: v=u+at,s=(u+v2)t,v2=u2+2as,s=ut+12at2,s=vt−12at2.

## What is current formula?

Ohm’s law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR. An alternative statement of Ohm’s law is I = V/R.

## What is watt Class 9?

Watt, denoted by W, is a unit of power. In the International System of Units (SI) it is defined as an amount of 1 Joule energy used per sec, and is used to quantify the rate of energy transfer with respect to time.

## What is pressure class 9th?

Pressure is an expression of force exerted on a surface per unit area. if a force F is applied on area A , then pressure P=F/A.

## What is the SI unit of power Class 9?

The SI unit of power is Watt (W) which is joules per second (J/s).

## What is the SI unit of momentum?

SI unit. kilogram meter per second (kg⋅m/s)

## What is the formula of velocity Class 9?

In the equation V = d/t, V is the velocity, d is the distance and t is the time. Determine the object’s acceleration by dividing the object’s mass by the force and multiply the answer by the time it took for it to accelerate.

## What is V motion physics?

They are often referred to as the SUVAT equations, where “SUVAT” is an acronym from the variables: s = displacement, u = initial velocity, v = final velocity, a = acceleration, t = time.

## What is the formula of energy?

Energy is defined as the capacity to do work. Formula. The energy stored in an object due to its position and height is known as potential energy and is given by the formula: P.E. = mgh.

## What is the first law of force?

Newton’s first law: the law of inertia Newton’s first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

## How do u calculate mass?

Mass is always constant for a body. One way to calculate mass: Mass = volume × density. Weight is the measure of the gravitational force acting on a mass. The SI unit of mass is “kilogram”.

## What is CGS full form?

The full form of CGS system is Centimeter Gram Second system. In the CGS system, fundamental units are Centimeter, Gram, and second. The full form of FPS system is Foot Pound Second system.

## What is the unit velocity?

Velocity is a vector expression of the displacement that an object or particle undergoes with respect to time . The standard unit of velocity magnitude (also known as speed ) is the meter per second (m/s).

## What is meant by 1 newton?

It is defined as that force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second. One newton is equal to a force of 100,000 dynes in the centimetre-gram-second (CGS) system, or a force of about 0.2248 pound in the foot-pound-second (English, or customary) system.

## Why is math so hard?

Because math involves using plenty of multi-step processes to solve problems, being able to master it takes a lot more practice than other subjects. Having to repeat a process over and over again can quickly bore some children and this may make them become impatient with math.

## What is the hardest subject?

The hardest degree subjects are Chemistry, Medicine, Architecture, Physics, Biomedical Science, Law, Neuroscience, Fine Arts, Electrical Engineering, Chemical Engineering, Economics, Education, Computer Science and Philosophy.

## Is physics harder than math?

Physics might be more challenging because of the theoretical concepts, the mathematical calculations, laboratory experiments and even the need to write lab reports.

## Is V final velocity?

final velocity (v) is measured in metres per second (m/s) initial velocity (u) is measured in metres per second (m/s) acceleration (a) is measured in metres per second squared (m/s²)

## Is velocity a speed?

Why is it incorrect to use the terms speed and velocity interchangeably? The reason is simple. Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement.