Exam 2017, questions and answers PDF

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PHY11 - Problem Set 1 1. Complete the following statement: The angular measure 1.0 radian is equal to a 0.0175°. . b 57.3°. . c 1.57°. . d 3.14°. . e 6.28°. .

2. A bicycle travels 141 m along a circular track of radius 30 m. What is the angular

displacement in radians of the bicycle from its starting position? a 1.0 rad . b 1.5 rad . c 3.0 rad . d 4.7 rad .

3. What is the angular speed in rad/s of the second hand of a watch? a 1.7 × 10–3 rad/s . b 0.10 rad/s . c 0.02 rad/s . d 6.28 rad/s .

4. The Earth takes slightly less than one day to complete one rotation about the axis passing

through its poles. The actual time is 8.616 × 104 s. Given this information, what is the angular speed of the Earth about its axis? × 10– rad/s b 2.321 × 10–6 rad/s a 7.292 . 5 . c 9.951 . d 6.334 .

× 10–5 rad/s × 10–4 rad/s

5. A wheel with a 0.10-m radius is rotating at 35 rev/s. It then slows uniformly to 15 rev/s

over a 3.0-s interval. What is the angular acceleration of a point on the wheel? a –2.0 rev/s2 . b 0.67 rev/s2 . c –6.7 . 2

rev/s rev/s2

d 42 ....