A mixer grinder rotates clockwise. Its angular velocity will be?
Correct answer: B. Negative
- A. Zero
- B. Negative
- C. Uniform but not zero
- D. Positive
Explanation
The angular velocity of a mixer grinder rotating clockwise will be negative. This is because the conventional direction of angular velocity is counterclockwise. When viewed from above, a clockwise rotating object has a negative angular velocity. The right-hand rule can be used to determine the sign of angular velocity. If you curl your fingers in the direction of rotation with your right hand, your thumb will point in the direction of the angular velocity. In the case of a clockwise rotating mixer grinder, your thumb will be pointing downwards, which means the angular velocity is negative.
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 frequency of a particle performing circular motion changes from 60 rpm to 180 rpm in 20s, then the angular acceleration is:
The dimensions of angular velocity are:
An elecric motor turns at 400 revolutions per minute. Its angular velocity in rad/s will be:
An object is travelling in a circle at a constant speed. Its angular velocity is:
For clockwise rotations, the direction of angular velocity is:
The minute hand of a large clock is 3.0 m long. What is its mean angular speed?