You have a cylinder rolling down a ramp, without slipping. There is a rope wrapped around it (pulling up) with tension T.
The direction of friction is always up the ramp. How do I picture this? From the math, I know that it must be true. But I cannot really imagine it.
The direction of friction is always up the ramp. How do I picture this? From the math, I know that it must be true. But I cannot really imagine it.