Two people sit on two ends of a seesaw. They sit in positions such that
the seesaw is balanced in a horizontal position. When one person leans toward
the center of the seesaw, that person's end of the seesaw will
fall,
rise, or
stay at the same level.
If the net torque on an object is zero, its
angular speed or
angular acceleration
is zero.
About which axis will the moment of inertia of a person be smallest?
vertical axis that passes from head to
toe
horizontal axis that passes through the
stomach and spinal cord
In your own words, explain what moment of inertia is. I don't want
equations. I just want a short conceptual explanation.
Suppose a billiard ball and a bowling ball are rolling down a smooth hill.
If they both started from rest near the top of the hill, which one will
reach the bottom first?
billiard ball
bowling ball
tie