i have the physics\' review sheet for the final exam, i have got most of answers

ID: 2159282 • Letter: I

Question

i have the physics' review sheet for the final exam,

i have got most of answers but the very last problems, 13, 14, 15

most of them are about the torque, inertia i think...

well i tried and i want to check my answers, so could anyone help me with those three problems?

if you dont have enough time to do all three,

you can just do a one problem. i will still very appreciate.

thank you!!

i took a picture of the problems, since the problems contain diagrams.

if the image down there is too big, you can save the image file in your computer and work on it ;)

thanks again!

ps.

some of them i circled two answers simultaneously, since i was not really sure...

15. The wheel will rotate about the step.

Balancing torques,

F*(R-h)=mgRCos 45

F=mgR/(R-h)Cos 45=2mg

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