1.

a wall clock has its minutes hand 7cm long find average speed and average velocity of the tip of the hand between 9am to 9:30 am​

Answer»

14 and 22 cm.Explanation:Since, the clock is moved from 9:00 to 9:30, the minute ARM has traveled and completed a semi circle to REACH 9:30. So, the the distance covered by the minute arm will be the arc from 9:00 to 9:30. The displacement will be the DIAMETER of the SWEPT area of the minute arm which will be 14 cm, The, distance will be π*r where r is the radius or the length of the minute arm. On solving we will get distance to be 22/7*7 = 22 cm.



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