The midpoint of the minute hand of the watch is at a distance of 2 cm from the center of the dial. determine the path L

| September 17, 2021 | education

The midpoint of the minute hand of the watch is at a distance of 2 cm from the center of the dial. determine the path L and the displacement s of this point for 30 minutes if it covers a path equal to 12.56 cm in an hour.

Since the midpoint of the minute hand of the watch covers a distance of 12.56 cm in an hour, the distance L traveled by this point for 30 minutes will be equal to half the distance traveled in an hour: L = 12.56 cm: 2 = 6.28 cm. Average the point of the minute hand of the watch is at a distance of 2 cm from the center of the dial, which means that in half an hour it will describe on the dial an arc with a radius of 2 cm, equal to half a circle with the center coinciding with the center of the dial. It will take a position on the other side of the center on the diameter of this circle and its movement will be equal to the diameter, that is, the doubled radius: 2 • 2 cm = 4 cm.



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