The minute hand of a large clock is 3.0m long. What is its mean angular speed?
Correct answer: C. 5.2 x 10^-3 rads-1
- A. 1.4 x 10^-4 rads-1
- B. 1 x 10^-3 rads-1
- C. 5.2 x 10^-3 rads-1
- D. 1.7 x 10^-3 rads-1
Explanation
Correct Option:CAngular velocity, time rate at which an object rotates, or revolves, about an axis, or at which the angular displacement between two bodies changes and doesn't depends on length. Since the hand of the clock makes one revolution per hour.Therefore,w=2π/t=2π/ 3600 = 0.001745 rad per seconds. Now, the linear velocity of the clock isv=wxr=0.001745 x 3 = 0.005236 m rad/s.)
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Angular Velocity
Angular velocity describes how quickly angular displacement changes with time, with ω = Δθ/Δt and units of radians per second. Questions relate angular and linear motion through v = rω, use the direction given by the right hand rule, and distinguish angular velocity from angular acceleration and ordinary frequency.
Practise Rotational and Circular Motion
521 free Rotational and Circular Motion MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Angular Velocity questions
When brakes of a car are applied, angular velocity of a flywheel reduces from 900 cycles/min to 720 cycle/min in 6sec. Angular retardation is _.
If a car moves with a uniform speed of 2 ms^-1 in a circle of radius 0.4, its angular speed is _.
The rate of change of angular velocity is called _.
For clockwise rotations direction of angular velocity is
For angular acceleration, clockwise rotation means torque is
The ratio of angular speed of the minute hand of the clock to that of its hour hand is?