CBSE Physics Notes: Work, Power and Energy Equations

Work, Power and Energy Equations

BY Team Aakash Byju's

Work - Definition, mathematical expression, dimension, and units (absolute units & gravitational units).

[{"selector":"#anim-cfe80122-e184-49a9-8389-1f0cfcf975a5","keyframes":{"opacity":[0,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-a1a62858-9654-4c67-ab5a-62aa0652169a","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Click Here To Attend Free Trail Class

[{"selector":"#anim-9a9b4903-ff77-4988-802e-15940a4ebeef","keyframes":[{"offset":0,"transform":"translate3d(0, -707.778%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":0.29,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"},{"offset":0.45,"transform":"translate3d(0, -199.0271736%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":0.61,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"},{"offset":0.71,"transform":"translate3d(0, -67.6635768%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":0.8,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"},{"offset":0.85,"transform":"translate3d(0, -25.409230200000003%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":0.92,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"},{"offset":0.96,"transform":"translate3d(0, -11.0413368%, 0)","easing":"cubic-bezier(.5, 0, 1, 1)"},{"offset":1,"transform":"translate3d(0, 0%, 0)","easing":"cubic-bezier(0, 0, .5, 1)"}],"delay":0,"duration":1300,"fill":"both"}] Download Aakash APP

Nature of work done - positive, negative, and zero work, work done by variable force and its mathematical treatment.

[{"selector":"#anim-941a62d7-b36b-4b5c-a43b-e0bbbed89cda","keyframes":{"opacity":[0,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-ed24aae4-de9d-48ed-95c6-cd216016d801","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Conservative forces and their properties, Non-conservative forces definition and example.

[{"selector":"#anim-28ea8190-1c02-4f6e-8e2b-4bc1b27c1e37","keyframes":{"opacity":[0,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-b4d09db1-767c-4d45-b861-d2defd6d7b82","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Definition of Power, Express Power mathematically.

[{"selector":"#anim-eeba6f8b-0434-44ba-83bb-2ff037a06bc0","keyframes":{"opacity":[1,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-ae6e2328-a82c-4558-a491-5893df40b93e","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Dimension of power and its SI unit.

[{"selector":"#anim-88ec6287-ae96-4380-9cdd-c53216d413dd","keyframes":{"opacity":[0,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-fd3fcc93-45d6-4322-9e4a-924ba0345e84","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Energy - Definition and different types of energy.

[{"selector":"#anim-37f21066-8b8d-4fca-a6ab-b6dcf213344c","keyframes":{"opacity":[1,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-6bf181ef-f616-4faf-9229-3a535ee61ce0","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Kinetic energy (KE) - Definition and its formula for kinetic energy using different methods.

[{"selector":"#anim-2ec31555-66df-4c5b-aee3-3cab703d8ada","keyframes":{"opacity":[0,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-e85819ed-baf6-4370-9dff-06135d941641","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Relationship between KE and linear momentum p. => KE=p2m, where m is the mass of the body.

[{"selector":"#anim-d95c2671-76cf-4b39-a38c-bbbea3e54a6d","keyframes":{"opacity":[1,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-7d5305ca-bba9-4010-89d2-e536c90886cf","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Work energy theorem or Work energy principle - statement and its proof.

[{"selector":"#anim-0637fd5e-d3b5-46fd-aff9-5bfb4eac66a7","keyframes":{"opacity":[1,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-42e2eb2d-e18b-4413-b324-c3325daf7d4d","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Potential and its forms, 2 lines each about all types of energy, mass energy equilibrium, and conservation, non-conservative forces.

[{"selector":"#anim-59d96901-00c1-49ff-8cbe-ade788a1d7cb","keyframes":{"opacity":[1,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-d6564c7b-3fb0-4958-917d-c9f2a59c3ab6","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Discuss the above points with your friends, which in fact is the best way of memorising topics.

[{"selector":"#anim-b96f5f8d-3dc9-41cc-8a33-6bf9b5660f74","keyframes":{"opacity":[1,1]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-cd7ee5a3-6a43-4935-946a-38777ab6a317","keyframes":{"transform":["scale(3)","scale(1)"]},"delay":0,"duration":1300,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]