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freshcoast
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Homework Statement
a) Calculate the magnitude of the constant average torque that acted on the system.
b) Assuming constant torque how far did the object rotate between t = 2 and t = 20 seconds?
Homework Equations
The Attempt at a Solution
Just checking to see if my answers are correct..
part a) since the graph is the change in θ over change in t, I can calculate the slope to find the ω. And then to find the torque, I needed to calculate 2 ω so I can find the [itex]\alpha[/itex] which then leads me to the torque.
So to find the 2 ω, I chose the points
ω1 = (100 rad - 1 rad) / (10s - 1s) = 11 rad/s
ω2 = (400rad - 100rad) / (20s - 10s) = 30 rad/s
[itex]\alpha[/itex] = (30 rad/s - 11 rad/s) / (20s - 1s ) = 1 rad/s2
[itex]\tau[/itex] = I[itex]\alpha[/itex] = (16kgm^2)(1 rad/s2) = 16 N * mpart b) is the question just asking for the change in angular displacement between t = 2 and t = 20?
if so I can figure that out by just looking at the graph 300 rad - 4 rad = 296 rad
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