IF THE LINEAR SPEED OF MINUTE HAND HAND OF WALL CLOCK IS 3.14 * 1/10000 M/SEC THEN LENGTH OF MINUTE HAND IS
1. 18 CM
2. 1800 CM
3. 3.14 CM
4. 314 CM
Answers
Answered by
108
the minute hand moves 360 deg = 2 π radians in one hour
so angular velocity = ω = 2 π / 3600 rad/sec
linear speed = v = r ω
π * 10⁻⁴ m/sec = r * 2 π /3600
=> r = 0.18 meters = 18 cm
so angular velocity = ω = 2 π / 3600 rad/sec
linear speed = v = r ω
π * 10⁻⁴ m/sec = r * 2 π /3600
=> r = 0.18 meters = 18 cm
Answered by
12
Answer:
18 cm
Explanation:
See first take out the distance [ D= circumference]
D=V*T
D=3.14*10⁴×3600. ( here power is -4)
[T=one complete round of minute hand
so it take one minute to complete = 3600sec]
Now 2×3.14×r= 3.14×10⁴ ×3600 ( since D= 2PiR )
r=3.14×10⁴×3600÷2×3.14. ( power is -4 )
=18×10²cm. (power is -2)
=18m
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