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  3. 2. a rigid disk with radius 2 m is spinning at an

2. A rigid disk with radius 2 m is spinning at an angular speed of 8...

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Physics

2. A rigid disk with radius 2 m is spinning at an angular speedof 8 1/s (or 8 rad/s). A constant angular acceleration is appliedthat slows downthe disk at a rate of 2 1/s2(or2 rad/s2).

(i) Calculate the number of revolutions the disk does beforecoming to a full stop.

(ii) Calculate the centripetal acceleration of a point,positioned at 1 m from the disk rotation axis, at t = 2 s.

(iii) Calculate the tangent speed of a point positioned at theedge of the disk at t = 2 s.

Answer & Explanation Solved by verified expert
4.5 Ratings (862 Votes)
Initial angular speed 0 8 radsFinal angular speed f 0 radsAngular acceleration 2 rads2 Negative as it is slowing the disk that isdecelarating itRadius of the disk R 2mTime    See Answer
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