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Unformatted text preview: kveton (ajk643) – hw6 – morrison – (60620) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Calculate the speed at the edge of a disc of radius 2 . 5 cm that rotates at the rate of 10 rev / s. Answer in units of m / s. 002 10.0 points A girl sitting on a merry-go-round moves counterclockwise through an arc length of 3.75 m. If the girl’s angular displacement is 2.48 rad, how far is she from the center of the merry-go-round? Answer in units of m. 003 10.0 points A car tire rotates with an average angular speed of 29 rad/s. In what time interval will the tire rotate 3 . 5 times? Answer in units of s. 004 10.0 points A figure skater begins spinning counterclock- wise at an angular speed of 4.1 π rad/s. Dur- ing a 4.7 s interval, she slowly pulls her arms inward and finally spins at 8.7 π rad/s. What is her average angular acceleration during this time interval? Answer in units of rad / s 2 . 005 (part 1 of 3) 10.0 points Consider the following values α avg Δ ω Δ t a +120 . 9 rad / s 6 . 1 s +1 . 8 rad / s 2 b . 87 s c- 2 . 0 turns / s 1 . 2 s What is the value of a ? Answer in units of rad / s 2 . 006 (part 2 of 3) 10.0 points What is the value of b ? Answer in units of rad / s. 007 (part 3 of 3) 10.0 points What is the value of c ? Answer in units of rad / s 2 ....
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- Fall '08
- Physics, 0.1 m, 2.5 cm, 3.75 m, 3.23 m, 4.62 m