ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 226

Question 1126

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What is the moment arm for the weight W about point A?

Length AB
Vertical height
Horizontal distance from A to CG
Angle θ

Question 1127

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What is the moment arm for the force F1 about point A?

AB
AC
BC
W

Question 1128

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What is the main reason for resolving F2 into components?

To increase force
To change direction
To apply equilibrium conditions in perpendicular directions
To eliminate torque

Question 1129

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What is the effect of increasing the mass of the ladder on F1?

F1 decreases
F1 unchanged
F1 increases proportionally
F1 becomes zero

Question 1130

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Why is the kinetic energy expression K = ½ Iω² valid only for fixed-axis rotation?

Because I changes
Because v is constant
Because all particles have the same ω only in such cases
Because gravity affects it