If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________?
Correct answer: B. 5 rad. S-1
- A. 4 rad. S-1
- B. 5 rad. S-1
- C. 1.6 rad. S-1
- D. 2.8 ms-1
Explanation
Linear speed and angular speed are related by v = rω. Hence, ω = v/r = 2 m/s ÷ 0.4 m = 5 rad/s. The likely mistake is choosing 4 rad/s by multiplying 2 m/s by 0.4 m instead of dividing by the radius.
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
The angular speed for daily rotation of the earth in rad S-1 is______________?
The angular speed of seconds hand of a watch in rads-1 is______________?
The shaft of a motor rotates at a constant angular speed of 360rev/min. Angle turned through in 1 sec in radian is________________?
The dimensions of angular velocity (ω) is:
The angular velocity of the minute hand of a clock is
If a wheel turns with a constant angular speed then: