A disk can rotate about its central axis like a merry-go-round. Which of the following pairs of values for its initial and final angular positions, respectively, give a negative angular displacement: (a) -3 rad, +5 rad, (b) -3 rad, -7 rad, ( c) 7 rad, -3 rad?

Explanation

To determine which pairs of initial and final angular positions give a negative angular displacement, we will use the formula for angular displacement:

\[ \Delta \theta = \theta_f - \theta_i \]

where:
- \(\Delta \theta\) is the angular displacement,
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