Exam-style question
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What happens to the angular speed of a rotating object if its moment of inertia increases while the torque remains constant?.
- A.Angular speed increases
- B.Angular speed decreases
- C.Angular speed remains the same
- D.Angular speed becomes zero
Model answer
What a good answer should say
- Angular speed decreases
Explanation
Why this works
According to the relationship between torque (τ), moment of inertia (I), and angular acceleration (α), τ = I * α. If I increases and τ remains constant, α must decrease, leading to a decrease in angular speed.
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