Question

What is the interrelation among work, energy and power?

Answer 1

Explanation:

Energy is measuredin Joules. Power is measured in Joules per second or Watts. Work can be defined as transfer of energy. In physics we say that work is done on an object when you transfer energy to that object.

Answer 2

★Question:

What is the interrelation among work, energy and power?

$\\ \\ \fbox{\huge \: ★answer }$

Work, Energy and Power

Work and energy

As we know from the law of conservation of energy: energy is always conserved.

→Work is the product of force and the distance over which it moves. Imagine you are pushing a heavy box across the room. The further you move the more work you do! If W is work, F the force and x the distance then.

$\fbox{\large \: W = Fx}$

Energy comes in many shapes. The ones we see over here are kinetic energy (KE) and potential energy (PE)

$\fbox{Transitional KE = ½ mv 2}$

$\fbox{Rotational KE = ½ Iw 2}$

here I is the moment of inertia of the object (a simple manner in which one can understand moment of inertia is to consider it to be similar to mass in transitional KE) and w is angular velocity

Gravitational PE = mgh

where h is the height of the object

$\fbox{Elastic PE = ½ k L 2}$

where k is the spring constant ( it gives how much a spring will stretch for a unit force) and L is the length by which the spring is stretched or compressed form the equilibrium position.

Power

$Power (P) \: \: is \: \: work( W) \: \: done \: \: in \: \: unit \: \: time (t).</p><p> \\ </p><p> \fbox{P = W/t}$

$as \: \: work \: \: and \: \: energy (E) \: \: are \: \: same \: \: it \: \: follows \: \: power \: \: is \: \: also \: \: energy \: \: consumed \: \: or \: \: generated \: \: per \: \: unit \: \: time.</p><p> \\ </p><p> \fbox{P = E/t}$

In measuring power Horsepower is a unit which is in common use. However in physics we use Watt. So the first thing to do in solving any problem related to power is to convert horsepower to Watts. 1 horsepower (hp) = 746 Watts