Author Question: Two cylinders made of the same material roll down a plane inclined at an angle q with the ... (Read 126 times)

go.lag · **on:** Jul 28, 2018

Two cylinders made of the same material roll down a plane inclined at an angle q with the horizontal. Each travels the same distance. The radius of cylinder B is twice the radius of cylinder A. In what order do they reach the bottom?
a. A reaches the bottom first because it has the greater acceleration.
b. A reaches the bottom first because it has a smaller moment of inertia. c. B reaches the bottom first because is experiences a larger torque. d. B reaches the bottom first because it travels a larger distance in one rotation.
e. They both reach the bottom at the same time, because each has the same linear acceleration.

Question 2

A top is set spinning so that the rotation is counterclockwise around its axis when viewed from above. When the top is placed on a level surface it happens that its axis of rotation is not quite vertical. Viewed from above, which way does the rotational axis of the top precess?
a. clockwise
b. counterclockwise
c. It's random, if it starts clockwise it will continue clockwise, and vice versa, i.e., a 50 chance either way.
d. The direction depends on the little shove given to the axis when the top is placed on the surface. e. In the northern hemisphere it will be clockwise, in the southern hemisphere it will be counterclockwise.