S Halliday, Fundamentals of Physics, 10e PHYSICS FOR SCIENCE AND ENGINEERING (PH

Question

S Halliday, Fundamentals of Physics, 10e PHYSICS FOR SCIENCE AND ENGINEERING (PHYS 2110/2120 ORION SCAEEN PAUNTER VERSION BACK NEXT Chapter 06, Problem 048 A roller-coaster car has a mass of 1300 kg when fully loaded with passengers. As the car passes over the top of a circular hill cf is the normal force (using the negative sign for the down ard direction) FN on the car from the track if the car's speed is v9.4 ms? (b) what is Fwrv-19m/s? Use 9-981m/s, radius 19 m, its speed is not changing. (a) At the top of the hill, what (a) Number Units (b) Number By accessing this Question Assistance, you will learn while you earn points based on the Point Potential Policy set by your instructor Question Attempts: 0 of 5 used SAVE FOR LATER answer this question correctly in four attempts or less.

Explanation / Answer

m = 1300 Kg

r = 19 m

a) for the normal force

fN = mg -mv^2/R

fN = 1300 * 9.8 - 1300 * 9.4^2/19

fN = 6694 N

the normal force is 6694 N

b) if v = 19 m/s

fN = mg -mv^2/R

fN = 1300 * 9.8 - 1300 * 19^2/19

fN = -11690 N

and normal force is -11690 N

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