College Physics Question?

Question

I really could use some help on this problem. Thanks for any help on it! This is a college physics problem.

If the system (shown in the figure linked below) is set in rotation about each of the axes listed below, find the torque that will produce an angular acceleration of 2.7 rad/s2 in each case.

http://www.webassign.net/sercp/p8-29.gif

____ N x m (x axis)
____ N x m (y axis)
____ N x m (axis through O and perpendicular to the page)

Answer 1

[I guess they want you to assume that the axes are halfway in between the distances that they gave?]

You know that torque = moment of inertia * angular acceleration

The moment of inertia: I = sum(mr^2) where m = mass and r = radius or distance from axis of rotation.

1. You're looking at distances from the x-axis- all of the masses are 3 m apart (if my hypothesis about the axes being halfway between the points is correct):

I = (m1 + m2 + m3 + m4)(r^2) = 11(3)^2 = 99

T = I a = (2.7)(99) = 267.3 N * m

Now do the other two. The second one is just like this one except with the other axis, but for the third one, you need to use Pythagorean theorem.

Answer 2

Ask an consultant interior the physics branch. distinctive colleges have distinctive names for various series of instructions they provide. case in point, at my college, that they had suggestions of Physics, customary Physics, Classical Physics, and Honors Physics. I took customary and that i'm particularly specific no different college teaches physics like that. So basically somebody at your college can make it easier to realize what the adaptation is. Random human beings on the internet have not have been given any thought.

Answer 3

Find the moment of inertia about each axis. Acceleration*inertia is torque