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15. (1 point) A racecar driver experience an acceleration of 41 m/s? while going around a sharp turn. How many gs does this acceleration correspond to? A) 0.44 B) 0.83 C) 1.5 2.7 16. (1 point) A 13 kg box sits in on the floor of an elevator that is accelerating upwards at 3.1 m/s2. What is the normal force acting on the box? A) 0N B) 127 N C) 168 N D) 316 N E) 555 N 17. (1 point) An object sitting on a completely level table doesnt move because of A) Newtons 1st law B) Static friction C) Kinetic friction D) Newtons 3rd law. 18. (I point) Three blocks are lined up next to each other on a level frictionle table. From left to right, call them blocks A, B and C. The blocks have mass from left to right, of 2.0 kg, 4.0 kg and 18.0 kg. All three blocks are pushed to right by a horizontal 12 N force applied to the 2.0 kg block. What is the net fo on block B? A) 0.5 N Ca +418 2.0 N D) 12.0 N (0.5) a) 19. (1 point) Which one of the following is not a contact force? A a normal force
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