Exam-style question
Try this first
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 constant
- D.Angular speed cannot be determined
Model answer
What a good answer should say
- Angular speed decreases
Explanation
Why this works
According to the relationship τ = Iα (torque = moment of inertia x angular acceleration), if the moment of inertia increases and the torque remains constant, the angular acceleration must decrease, leading to a decrease in angular speed over time.
Common mistake
No common mistake is linked to this question yet.