What is energy formula Class 11?

What is energy formula Class 11?

1. Kinetic Energy. The energy possessed by any object by virtue of its motion is called its kinetic energy. Kinetic energy of an object is given by. k = 1 / 2 mv2 = p2 / 2m.

What is the physics formula for energy?

Overview of Work, Energy and Power

What is class 11 physics work?

In Physics, work is defined as the product of force and displacement. If an object is acted upon by a force, work done is nothing but the product of the magnitude of this force and the displacement of the object caused by the force.

What is Einstein’s Class 11?

Physicists believed that in every physical and chemical process, the mass of an isolated system is conserved till Albert Einstein show the relation , E = m c2 where c, the speed of light in vacuum is approximately 3 ×108 m s–1. This equation showed that mass and energy are equivalent and are related by E = m c2 .

What is SI unit of energy?

The SI unit of energy/work is the joule (J), named for English physicist James Prescott Joule (1818 – 1889). One joule equals the work done by a force of one newton moving an object one meter (J = N · m).

What is the work energy equation?

The formula to find the work done by a particular force on an object is W equals F d cosine theta. W refers to the work done by the force F. In other words, W is telling you the amount of energy that the force F is giving to the object.

How can I get a job in Class 11?

If the force acts at an angle θ to the displacement, we can calculate the work done using the formula W=Fdcosθ .

What is meant by 1 Joule work?

joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377 foot-pounds.

What is E mc2 Byjus?

The theory states that the amount of energy possessed by an object is equal to its mass multiplied by the square of the speed of light. According to Einstein’s Theory, equivalent energy can be calculated using the mass (m) and the speed of light. E=mc2.

What is E in Einstein’s photoelectric equation?

: an equation in physics giving the kinetic energy of a photoelectron emitted from a metal as a result of the absorption of a radiation quantum: Ek=hν−ω where Ek is the kinetic energy of the photoelectron, h is the Planck constant, ν is the frequency associated with the radiation quantum, and ω the work function of the …

What are the CBSE Class 11 physics notes?

CBSE Class 11 Physics Notes : Work, Power and Energy. When a force acts on an object and the object actually moves in the direction of force, then the work is said to be done by the force. Work done by the force is equal to the product of the force and the displacement of the object in the direction of force.

How is work defined in energy and power Class 11?

Work, Energy and Power Class 11 Notes Physics Chapter 6 • Work is said to be done when a force applied on the body displaces the body through a certain distance in the direction of applied force. It is measured by the product of the force and the distance moved in the direction of the force, i.e., W = F-S

What is work, energy and power in physics?

Physics Notes Class 11 CHAPTER 6 WORK, ENERGY AND POWER. Work When a force acts on an object and the object actually moves in the direction of force, then the work is said to be done by the force. Work done by the force is equal to the product of the force and the displacement of the object in the direction of force.

Which is the correct formula for energy in physics?

The formula for Energy: P.E. Potential Energy m Mass of the object g Acceleration due to gravity h Height