the length of second hand needle of a watch is 10 cm. calculate the average speed of a needle.
hint-distance
upon
time.
speed=2πr
upon
60×10
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Answered by
0
Answer:
Sorry I don't know answer
Answered by
1
Answer:
Explanation:
We know,
Speed = Distance / Time
Here distance will be the circumference of the circle that second-hand makes in one complete revolution. Therefore, Distance = 2 * pi * r (circumference)
r (radius) = 10 cm (length of second hand)
Distance = 2 * 3.14 * 10 cm
Distance = 62.8 cm
Now, the time it takes to complete one full revolution by second hand = 60 seconds
Speed = 62.8 cm / 60 seconds
Speed = 1.0466 cm/second
Therefore, Speed of the tip of 10 cm long second hand of a clock is 1.0466 cm/second .
I hope this helps.
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