What torque must be applied to a wheel with a moment of inertia of 0.19 kg·m^2 to make it rotate at 11 rad/s in 10 s?
a.
0.21 Nm
c.
0.017 Nm
b.
5.8 Nm
d.
0.17 Nm

Question

What torque must be applied to a wheel with a moment of inertia of 0.19 kg·m^2 to make it rotate at 11 rad/s in 10 s?
a.
0.21 Nm
c.
0.017 Nm
b.
5.8 Nm
d.
0.17 Nm

anonymous · Answer

@kewlgeek555

anonymous · Answer

$$F = ma$$
this is newtons second law in linear motion

similarly do you know what is newton's second law in Rotational motion?

anonymous · Answer

Well, I have 3 questions left that I've attempted. but failed miserably. Just kinda lookin for an answer. so i can go back and check my work.

anonymous · Answer

tel me what is your answer.. and ll check if its right :P

anonymous · Answer

I got A.

anonymous · Answer

now im doing a retake for my online course and it was wrong but now i don't see why?

anonymous · Answer

that is right o.O .. although your question is poorly worded

m assuming that the wheel is initially at rest, and it is required to get it up to a speed of 11 rads/second in 10 seconds.. 
in that case, required angular acceleration is 1.1 rads/sec^2
and the required torque= 1.1 times 0.19 = 0.209 Nm

anonymous · Answer

@Mashy This online class is ridiculous. even some questions that i got that should be right. Aren't. It's somewhat of a mess XD But thank you very much, mind helping me with another?

anonymous · Answer

sure!