Question

It's possible for a body to have both rotational and translational motion at the same time.
True. <<

False.

2. The moment of inertia of an object would be different on the surface of the earth than on the surface of the moon.

True. <<

False.

3. The moment of inertia is the rotational equivalent of mass.

True.
False. <<


4. The direction of torque is always parallel to the force and the moment arm.

True. <<

False.


5. Torque is a scalar.

True.

False. <<

6. When you push on a door to open it, it always requires the same torque no matter where you push.

True.

False. <<


7. If the line of action of a force is directly through the axis of rotation, you have the maximum torque.
True.
False. <<


8. If a system is in rotational equilibrium, the sum of all torques has to be positive?

True. <<

False.

Answer 1

Gulp - re-read chapter !
1. right sure, rolling ball
2. wrong, m r^2 does not change on Moon
3. wrong true, Moment = I alpha is F = m A
4. No, false , cross product perpendicular to both
5. right, vector
6. wrong, true, hinge works on torque (unless the latch is stuck :)
7. right
8. wrong, sum of moments (torques) is zero for equiblibrium (constant angular momentum)