17. A 600-kg car is going around an unbanked curve with a radius of 110 m at a s

Question

17. A 600-kg car is going around an unbanked curve with a radius of 110 m at a speed of 24.5 m/s. What is the appropriate friction coefficient so that the car stays on its path? A) 0.28 B) 0.14 C) 0.56 D) 0.72 E) 0.08 18. A 5 g bullet is stopped in a suspended block of wood of 5 kg mass. The maximum height the bullet-plus-wood ballistic pendulum reaches after the collision is 8 cm. What was the original speed of the bullet? A) 362 m/s B) 3600 m/s C) 1000 m/s D) 752 m/s E) 1253 m/s 19. A solid cylinder, starting at rest, is rolling down an incline without slipping. When compared to a box, sliding from rest down the same frictionless incline, what can you say about the final sped of the two objects at the bottom of the incline? A) th cylinder will be faster B) the cylinder will be slower C) they will have the same speed D) the box will not reach the bottom E) there is not enough information to answer the question. 20. Arvin the Ant sits in a CD that rotates from rest to a maximum angular speed of 45 rad/s in 12 seconds. How far did Arvin travel in 8 seconds ? A. 3.75 rad B. 15.0 rad C. 30.0 rad D. 120.0 rad E. 240.0 rad

Explanation / Answer

my answer is 17) C 18) D 19)A 20)C

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