A UPS truck is traveling at a constant speed of 4.00 m/s around a circular rotar

Question

A UPS truck is traveling at a constant speed of 4.00 m/s around a circular rotary which has a radius of curvature equal to 20.0 m 8. True or False: The truck is accelerating? a. True b.False 9. The centripetal acceleration of the truck has a magnitude of a. 125 b. 0800 m .0200m d. 980 e. zero 10. The tangential acceleration of the truck has a magnitude cf a. 0800m b. 0200 d. 980m e zero 11. Which of the following diagrams shows the approximate direction of the truck's (overall) acceleration? a) c) d) e) The truck is not accelerating. and zero acceleration has no direction. A car is traveling around a circular rotary which has a radius of curvature equal to 20.0 m. At a certain instant of time, the car is traveling at a speed of 5.00 m/s and the car is speeding up at a rate of 4.002 12. Which of the following diagrams shows the approximate direction of the car's (overall) acceleration? a) b) c) e) 13. The centripetal acceleration of the car has a magnitude of a. zero b. 4,19 c. 125m d. 4.00 e. 525 m 14. The overall acceleration of the car has a magnitude of c 525m a. 400 b. 125 m e 4.19 m 3A

Explanation / Answer

8] True. The truck is accelerating but the acceleration is radial in nature (centripetal).

9] Centripetal acceleration will be:

ac = v2/r = 42/20 = 0.8 m/s2 [option b].

10] Since the angular velocity of the truck is constant (because of the constant speed) therefore, the tangential velocity is zero [option e].

11] The acceleration will be towards the center and the tangential velocity will be perpendicular to it. [option c].

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