ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 138

Question 686

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Why does a radial force do no work on a rotating particle?

Because it is too small
Because displacement is zero
Because it is perpendicular to the tangential displacement
Because mass is constant

Question 687

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What determines the magnitude of torque about an axis?

Only force magnitude
Only distance
Product of force and perpendicular distance from the axis
Angle θ only

Question 688

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How is angular velocity ω defined in terms of angular displacement?

ω = θ/t
ω = d²θ/dt²
ω = rθ
ω = dθ/dt

Question 689

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What is the rotational analog of Newton's second law?

F = Ma
τ = Iω
τ = Iα
L = Iω

Question 690

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Why are torques added algebraically when acting on a rigid body about a fixed axis?

Because they are perpendicular
Because they cancel out
Because all torques are parallel to the axis and can be treated as scalars
Because only one torque acts