Take a vehicle with an open differential. Let's say one wheel is on
ice, and the other is on dry pavement. When you step on the
accelerator, the wheel on ice spins and the wheel on pavement does
little or nothing. This is the "equal torque" part of open
differentials at work. It takes very little torque to spin the wheel on
ice. So, the speed of the wheel on ice goes up, since it's not
providing much resistance.
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