Question

. 1mpossiore to dciu 002 (part 1 of 2) 10.0 points A disk with a radius of 0.1 m is spinning about its center with a constant angular speed of 10 rad/sec. 4. What are the speed and magnitude of the acceleration of a bug clinging to the rim of the disk? 1. 1 m/s and 0 m/s (Disk spins at constant A de 2.0.1 m/s and 1 m/s2 3. 10 m/s and 10 m/s2 4. 1 m/s and 10 m/s speed.) of c rate Fi Ar Thro durin An: 003 (part 2 of 2) 19.0 points Let the turntable spin faster and faster, with constant angular acceleration a. Which sketch qualitatively shows the direc- The s mined tion of the acceleration vector a of the bug?

Answer 1

Radius of the disk, R = 0.1 m Angular speed, w = 10 rad/see Then speed of the bug is, N = RW = (0.1) (1 0) m/s = 1 m/s And accelerations, a_r = RW^2 = (0.1) (10)^2 m/s^2 = 10 m/s^2 2 Here turntable spin faster and faster with constant angular acceleration alpha vector Here the bug has an acceleration (radial) a_r vector towards the center of the circle And also have an acceleration in the same direction as its velocity (counter clock wise), the net acceleration is the vector sum a_r vector and a_t vector rightarrow Hence answer will be option (c)