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What is Work?
When an external unbalanced force is applied to move an object, the work is considered to be done. The unit of Work is Joules. Throwing a stone, kicking a football and pushing a car are examples of the work that is done to displace the object in the direction of the applied force.
Formula: Work = F*S
Here,
F is force exerted on the body
S is the distance moved by the body while the force was acting on it.
What is Energy?
Energy in physics is defined as the capacity or the ability of a body to carry out the given work. There are three major types of energy: Kinetic energy, Potential energy & mechanical energy. Kinetic energy is the energy that a body derives from being in motion with respect to the mass. Potential energy is the energy that the body stores within, it depends on factors such as position, mass & velocity Mechanical energy is the energy that is derived by a body due to the virtue of its motion (kinetic energy) or due to its position (mechanical energy).
What is Power?
The rate at which the amount of energy gets transferred to get the work done is called Power. The SI unit of power is Watt. Let us take this example of a weightlifter who lifts the weight of X Joules in Y seconds and another weightlifter who manages to lift X joules in Z seconds ( where Y>Z). Keeping the amount of work done the same , power would vary since it is dependent on the time in which a work is completed.
Formula: P = E/t, where P is power, E is energy, and t is time
Difference between:
Work & Power
| Work | Power |
|---|---|
| SI unit of Work is Joules | SI unit of Power is Watt |
| Work is the product of force and displacement | Power is the ratio of energy and the time taken |
| It is time independent | It is time independent |
| Power | Energy |
|---|---|
| SI unit of power is Watt | SI unit of Energy is Joules |
| Power is the rate at which the body to work is done | It is the capacity of a perform the work |
| Power is an instantaneous quantity | Energy is time-component |
| Energy | Work |
| Energy is the virtue that carries out of the work. | Work is considered to be done when an unbalanced force is applied on an object. |
| Energy does not have directions. | Work has positive or a negative direction. |
| Potential energy= M*g*h (M stands for mass g stands for gravitational acceleration h stands for height of the object) | Work = Force x Displacement |
Conclusion:
In this article , we learnt in detail about what Work power & energy is. We also learned about their units , functions with some fun examples. We looked how they are all different from each other
