# Factors related by work energy principle - Mechanics

Q.  Which of the following factors are related by work energy principle?
- Published on 18 Sep 15

a. force, displacement and time
b. force, velocity, time and mass
c. force, velocity, displacement
d. displacement, time and mass

#### Discussion

• Sravanthi   -Posted on 15 Dec 15
- The different factors related by work-energy principle are mass, force, velocity and displacement. Work done is equal to change in kinetic energy.

- Therefore, work-energy principle relates scaler quantities such as work and energy.

Algebraic sum of work done by different forces = Difference between kinetic energy of the systems at two different positions.

W1→2 = (Kinetic energy)2 - (Kinetic energy)1

Scaler quantity: It is a physical quantity which has only magnitude and no direction.

Vector quantity: It is a physical quantity which has both magnitude and direction.

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