1. Without centripetal force from the sun: A. the centripetal acceleration of an object towards the center of a circle. B. the planet would travel towards the center of a circle. C. the planets would travel the sun in elliptical. D. the planets would travel in a straight line. 2. A disk rotating with an angular velocity of 40rad/s starts to slow down at a rate of Srad/s every second. If the radius of the disk is 0.5m. How long will it take for the disk to come to rest? A.5sec B. 4sec C.3 sec D. 2 sec 3. A CD in a CD drive in a computer accelerates from rest to 2000rpm in 4seconds. What is its angular acceleration? A. 25rad/s² B. 60rad/s² C. 52.4rad/s² D. 25.2rad/s² 4. A 60Nm torque acts on a wheel of I-300kgm². If the wheel starts from rest, how long will it take the wheel to reach an angular speed of 2rad/s ? A.5sec B.10sec C. 15sec D. 25sec 5. Which one of the following is the property of projectile motion? A. Horizontally changing velocity C. Acceleration in the horizontal direction D. Acceleration changes its direction B. Vertically changing velocity 6. A disk of mass 10kg and radius 20 cm is free to rotate about its center. If a force of 50N is applied on it tangentially. What is its angular acceleration? A.5rad/s² B. 25rad/s² C.50rad/s² D. 65rad/s² 7. A 20kg wheel is acted on by a torque of 40Nm to change its speed from 40rad/s to 100rad/s. through what angle does it moves if it has a radius of gyration 50cm? A. 80rad B.500rad C. 840rad D. 525rad the average 8. A baseball rolls at 20rad/s for 2min, 25rad/s for 1.5min and 45rad/s for 3min. finde speed of the ball. A. 25rad/s B. 32.7rad/s C. 100rad/s D. 525rad/s​