ROTATIONAL MOTION

How is the angle φ₁ related to angle α₁ in the context of force and radius vector?

• φ₁ = α₁
• φ₁ - α₁ = 90°
• φ₁ + α₁ = 180°
• φ₁ + α₁ = 90°

What is the expression for the work done by a force F₁ on a particle undergoing rotational displacement?

• F₁ds₁cosφ₁
• F₁r₁dθsinα₁
• τ₁dθ
• F₁r₁dθ

What is the angular displacement dθ defined as in the context of rotational motion?

• ∠OP₁C
• ∠P₁CP₁′
• ∠COP₁
• ∠P₁OC

What is the magnitude of the displacement ds₁ of a particle in time ∆t during rotational motion?

• r₁θ
• r₁²dθ
• v₁t
• r₁dθ

What is the direction of the displacement vector ds₁ of a particle moving in a circular path?

• Radial direction
• Along the radius vector
• Tangential to the circular path at P₁
• Perpendicular to the plane of rotation