ROTATIONAL MOTION MCQ Quiz: GKFix - Bridge of Knowledge - Page 52

Question 256

▼

How does a fixed axis constrain a rigid body's motion?

Allows free translation
Causes vibration
Allows rotation and translation
Allows only rotation about that axis

Question 257

▼

In v = ω × r, what is the direction of r?

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

Question 258

▼

Why do internal torques sum to zero in a particle system?

Forces are too small
Torques are random
Not calculated
Internal forces act in pairs along the line joining particles

Question 259

▼

What role does the origin play in calculating angular momentum?

Must be at center of mass
Has no role
Eliminates internal forces
Reference point for position vectors

Question 260

▼

What happens to angular momentum when external torque is absent?

It vanishes
It doubles
It reverses
It stays constant