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.
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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.
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