On a round clock, the hour hand and minute hand look similar, just different lengths

Why

Samar's assumption makes sense if you think of the clock as one single machine that must move all of itself at one pace, the way a fan's blades all spin together at the same rate. But the two hands aren't rigidly linked to turn together — they're driven separately, each completing its own full circle in a different amount of time on purpose. The minute hand completes one full trip around the clock face every 60 minutes; the hour hand takes twelve times as long, one full trip every 12 hours (720 minutes), because it needs to move only a tiny fraction as far to mark each passing hour. That means the minute hand is turning twelve times faster than the hour hand, at every moment, not just sometimes. Test: watch the minute hand for five minutes and you can clearly see it move; watch the hour hand for the same five minutes and its movement is nearly impossible to catch by eye. No, the minute hand turns far faster: the two hands are built to complete their circles in very different times, twelve times apart, not at matching speeds.