Homeworkc Homowork 8 X https://www.fl.p.tp unititeml D=3363901 &enrollmentID;=29

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Homeworkc Homowork 8 X https://www.fl.p.tp unititeml D=3363901 &enrollmentID;=292879 a search Unit 15: PrelectureCheckpcint&Homewerk; Prohlems Homework: Homework 8 Print Assignment viow Doadine: 100% until Thursday, March 15 at 8:00 AM Stardard Exercise Multiple Choice 5 Problem 22 Standare Exercise Multiple Choice 8 A billtard ball of mass 180 g and radtus 2.80 cm starts with a translational speed of 1.00 m/s at point A on the track as shown in the figure helaw. If paint is at the tap af a hill that has a radius af curvatur ot 70 em, what is the normal force acting on the ball at point 8Assume the billiard ball rolls without slipping on the track. Problem 20 10 cm Standard Excrciss Problem 22 Problem 23 Standard Exarcisa Problem 45 1) What is the normal forcc acting on the ball at point 0 (Express your answer ta two significant figures. N Submt Standard Exereiso Problem 46 You curently uve 0 submissions for Lhis questiov. Only 10 submission ure ullowed. You con make 10 more submisstons for this question. Standard Exerciso Problem 47 Standard Exercree Cumulatlve Problem 18 O Type here to search 1:27 PM 3/14/2018

Explanation / Answer

when ball moves from point A to point B it's kinetic energy is increases..

(KE)B = (KE)A + mgh

(KE)B = 1/2mv^2 + mgh

(KE)B = (1/2 x 0.180 kg x 1^2) + (0.180 kg x 9.81 m/s^2 x 0.10 m)

(KE)B = 0.09 + 0.177

(KE)B = 0.267 J

1/2mVB^2 = 0.267 J

VB = 1.721 m/s

At point B,

mg - N = mVB^2 / r

N = mg - mVB^2 / r

N = (0.180 x 9.81) - (0.180 x 1.721^2) / 0.70

N = 1.7658 - 0.762

N = 1.004 N

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