For this question instead of the question in part D asking about revolutions it

Question

For this question instead of the question in part D asking about revolutions it asked for time, how would one go about solving for that? Which equation would you use and what answer would you get? Please explain step by step im totally lost in finding how to find time. And dont use the 40 seconds given in the questions. How would you go about solving the entire question from part a to f without being given the time of 40 seconds and having to solve for it in part d rather than having to solve for revolutions.

i was thinking about using the equation theta=Wot + 1/2sigma t^2 (where this part=0 since we assume sigma is 0). but than time = theta/Wo but idk where to go from there or if thats even the right path

Explanation / Answer

you will be needing one value either time or number of rotation before coming to rest as we cannot find acceleration with just initial and final velocities

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