Physics Please check my answers
posted by Chelsea on .
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.

Gulp  reread 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)