Physics Work

Question 0

Joule

Answer 0

The work dome when a force of 1N moves a body through the displacement of 1m in the direction of the force

Question 1

Work

Answer 1

When a force moves an object through a displacement in the direction of the force , work done equals force by displacement
Unit - J (joule) or Nm

Question 2

Energy

Answer 2

The ability to do work , the amount of energy a body has is equal to the amount of work it can do
Unit- J

Eg potential, kinetic, chemical , nuclear

Question 3

Kinetic energy

Answer 3

Energy of a body due to it’s motion

1/2mv(2)

Question 4

Potential energy

Answer 4

Energy of a body due to it’s position in a force fiekd

Mgh

Question 5

Sound energy

Answer 5

Any source of sound is an object in vibration , as sound travels through a substance vibrations pass from molecule to molecule in the substance

Question 6

Principle of conservation of energy

Answer 6

Energy cannot be created or destroyed , it can only be converted from one form to another

Question 7

Relationship of potential & kinetic energy

Answer 7

Loss in potential energy = gain in kinetic energy (and reverse)
1/2mv(2) = mgh

Question 8

Power

Answer 8

Rate at which work is done or
Rate at which energy is converted from 1 form to another
P = w/t or e/t
Unit = w (watt)