Question
Question: A wall clock has a 5 cm long minute hand. The average velocity of the tip of the hand reaching 0600 ...
A wall clock has a 5 cm long minute hand. The average velocity of the tip of the hand reaching 0600 hrs. to 1830 hrs. is
A
2.2 × 10-14 cms-1
B
1.2 × 10 -4cms-1
C
5.6 × 10 -3 cms-1
D
3.2 × 10-3 cms-1
Answer
2.2 × 10-14 cms-1
Explanation
Solution
Displacement of minutes hand = 10 cm
Time difference between 0600 hrs to 1830 hrs is 12 hr and 30 minutes i.e., 45000 s
∴ Average velocity = 10/45000
= 2.2 × 10-4 cms-1