ROTATIONAL MOTION

How does the conservation of angular momentum apply to celestial bodies?

• It causes gravitational collapse
• It stops planetary motion
• It makes planets spherical
• It explains stability of planetary orbits and rotational speeds

What is the result of the cross product of two parallel vectors?

• Sum of the vectors
• Difference of the vectors
• Unit vector
• Zero vector

What is the primary factor that distinguishes rotational from translational motion in rigid bodies?

• Mass of the body
• Speed of motion
• Temperature of the environment
• Presence of a fixed axis or point

How does a fixed axis constrain the motion of a rigid body?

• It allows free translation
• It causes vibration
• It allows rotation and translation
• It allows only rotation about that axis

What is the direction of the position vector r in v = ω × r for a rotating particle?

• From the particle to the origin
• Tangential to the path
• Perpendicular to the axis
• From the origin (fixed point) to the particle