Figure 10-21b is a graph of the angular position of the rotating disk of Fig. 10-21a.(adsbygoogle = window.adsbygoogle || []).push({});

Figure 10-21

(a) Is the angular velocity of the disk positive, negative, or zero at t = 1 s?

positive

negative

zero

(b) Is the angular velocity of the disk positive, negative, or zero at t = 2 s?

positive

negative

zero

(c) Is the angular velocity of the disk positive, negative, or zero at t = 3 s?

positive

negative

zero

(d) Is the angular acceleration positive or negative?

positive

negative

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# The Rotational Variables

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