Physicists do it on accelerated frames. Physicists do it particularly. Physicists do it repulsively. Physicists do it strangely. Physicists do it with charm.
Physicists do it with large expensive machinery.
Physicists do it with rigid bodies. Physicists do it with string and sealing-wax. Physicists do it with Tensors. Physicists do it with their vectors. Physicists do it with uniform harmonic motion.