a) What is the definition of average angular acceleration?

b) The instantaneous angular acceleration is the slope of the curve at a given time. Your "curve" in this case is a straight line. How do you determine the slope of a line?

c) The angular displacement may be found from the time - angular velocity graph as the area under the curve for a given time limit.

d) You know the angular displacement from c). How do you convert an angle in radians to a number of revolutions?

-Dan

__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

I need some clarification on the angular displacement formula. Is it supposed to be $\displaystyle \theta = 3 - 2t$ or $\displaystyle \theta = 3 - 2t^3$?

In either case
a) The average angular acceleration is given by
$\displaystyle \bar{\alpha} = \frac{\omega - \omega_0}{t}$

How do you find the angular velocity if you know the angular displacement?

b) The angular acceleration here (without the word "average") means the instantaneous angular acceleration. How do you find the angular acceleration from the angular velocity you used in part a)?

I'll help out with the rest later. Give these two a try and if you still have questions about them, go ahead and post.

-Dan

__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

Yeah thanks but i still dont get in it , i just want the formulas and the solutions so i can hand it in, im weak at physics so im focusing on my other subjects. this is a homework that i need to hand in.

Yeah thanks but i still dont get in it , i just want the formulas and the solutions so i can hand it in, im weak at physics so im focusing on my other subjects. this is a homework that i need to hand in.

but thanks anyway

Do I even need to make my next comment then?

-Dan

__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.