Recent content by Katy96

that's where I get stuck

this is what I know, i need to use the change in the KE to find the final angular speed, and hence the angular deceleration, using the equations of angular motion and torque Important to show answer is negative, as result of deceleration The force providing the centripetal acceleration acts...

sorry it meant to say Determine also the mean frictional torque causing the slowing down in the two minute stop.

Its just part e I'm struggling on now

thanks.

when I did that I got the right answer so in part c do I use vmax=rωmax or do I use I=0.606mr2

okay well do I just divide by 2pi? because I thought you would do 16000X2pi/60

2Pi/60?

yes its given in revolutions per min, and I am unsure of how to change it from revolutions per min to radians per second once I do that I know how to do part b)

I have, I can't figure it out and by that I mean how do I change it to something I can use units wise

which is ω?

so in part b I know I need to use

ive done it, and done part a, I am just getting confused on which equations I need to use for which parts.

so how do I change 48km/h into m/s? never mind I got it now!

the answer, Maximum kinetic energy = 1.42 MJ, is given in the question, when 30mph is used you get 7200000 which is also the wrong answer