### Rotational Power Formula :

Rotational power formula P_{(w)} in watts is equal to the torque τ _{(Nm-1)} in Newton per meter^{-1} and multiply the two and divided by the π value 3.14 and multiply the product of revolutions rpm_{(min-1)} in minute^{-1}.Hence the Rotational power formula can be written as

**P _{(w)}= τ _{(Nm-1)}*2/ π *rpm_{(min-1)} /60**

Where,

P→ rotational power watts

τ →torque in Nm^{-1}

rpm→ revolutions per minute

### Example:1

Calculate torque is 30Nm and rpm is 50 find the rotational power?

### Answer:

Torque =30Nm

Rpm=50

P_{(w)}= τ _{(Nm-1)}*2/ π *rpm_{(min-1)} /60

P=30*2*3.14*50/60

P=157.079w

### Example:2

Calculate torque is 80Nm and rpm is 20 find the rotational power?

### Answer:

Torque =80Nm

Rpm=20

P_{(w)}= τ _{(Nm-1)}*2/ π *rpm_{(min-1)} /60

P=80*2*3.14*20/60

P=167.46w