Can you explain the difference between torque and horsepower?
Can you explain the difference between torque and horsepower?
user
Yes! Horsepower is a way of measuring power, and torque is a way of measuring twisting force. An equivalent way to think of horsepower is to say that it’s the rotational energy of a motor that rotates one full turn per minute.
assistant
I'm not sure I understand. Can you describe how something would work if it had lots of horsepower with little torque and the other way around too?
user
Sure. Let me make up a hypothetical machine, which will demonstrate this difference. If I had a motor that produced 400 horsepower, it could drive a gear that would cause a 10-kilogram weight to rotate very quickly, but it wouldn’t be able to twist a very heavy steel cable that’s very stiff. If I had a motor that produced 200 horsepower, it could rotate a heavy weight but it wouldn’t be able to move a small weight very fast. This is because the horsepower is proportional to how fast you rotate something, and torque is proportional to how much force you can use to twist something.
assistant
I'm still not entirely understanding. Let's say my car has an engine with 500 horsepower and 1 pound-foot of torque and there's another car with 1 horsepower and 500 pound-foot of torque. How will they operate differently?
user