Question

As a result of friction, the angular speed of a wheel c hanges with time according to d θ d t = ω0 e −σ t , where ω0 and σ are constants. The angular speed changes from an initial angular speed of 4.75 rad/s to 3.85 rad/s in 3.92 s.

a) Determine the magnitude of the angular acceleration after 2.85 s. Answer in units of rad/s^2 .

part A answer is 0.2184965525 rad/s^2

b) How many revolutions does the wheel make after 3.48 s ? Answer in units of rev.

c) Find the number of revolutions it makes before coming to rest. Answer in units of rev.

only part b and c needded

Answer 1

3.92 wo e ое b) d)

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