What is the Difference Between Power and Torque?

The main difference between power and torque lies in their definitions and applications. Here are the key differences between the two:

• Definition: Torque is the force produced by an engine that results in a twisting motion, causing an object to rotate around an axis or pivot point. Power, on the other hand, is the rate at which work is done or energy is transferred.
• Calculation: Torque can be calculated using the equation $$\tau = Fr_{\sin(\theta)}$$, where $$\tau$$ is torque, $$F$$ is the force, $$r$$ is the distance from the center of rotation, and $$\theta$$ is the angle between the force and the distance. Power can be calculated using the equation $$P = \frac{\Delta E}{\Delta t}$$, where $$P$$ is power, $$\Delta E$$ is the change in energy, and $$\Delta t$$ is the change in time.
• Measurement: Torque can be measured using a torque sensor or a torque meter. Power can be measured using an energy meter and a multimeter.
• Application: Torque is the force that makes a car move and accelerate, as it is transferred from the engine through the transmission, differential, and axles. Power determines how fast the car accelerates, as it is a measure of how quickly the engine can produce that torque-force moment.

In summary, torque is the force that results in the rotation of an object, while power is the rate at which work is done or energy is transferred. Torque is a measure of an engine's muscle, while power determines how fast it can flex that muscle.

Comparative Table: Power vs Torque

Here is a table highlighting the differences between power and torque:

In summary, power is the rate of doing work, while torque is the force causing an object to rotate. Power is a scalar quantity, measured in watts or horsepower, and is the product of torque and angular velocity. Torque is a vector quantity, measured in Newton-meters or foot-pounds, and is the rotating force produced by a motor's crankshaft.