Question

6.1.2.3

a, A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14.0 m/s, the horizontal total force on the driver has magnitude 133 N. What is the total horizontal force on the driver if the speed on the same curve is 17.9 m/s instead?

magnitude	N
direction	---Select--- inward outward

b. A space station, in the form of a wheel 101 m in diameter, rotates to provide an "artificial gravity" of 2.60 m/s² for persons who walk around on the inner wall of the outer rim. Find the rate of the wheel's rotation in revolutions per minute that will produce this effect.
_______ rev/min

c. A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates a curve in the flat road. The curve may be regarded as an arc of a circle of radius 37.8 m. If the coefficient of static friction between crate and truck is 0.640, how fast can the truck be moving without the crate sliding?
v_max = _________ m/s

Answer 1

Centripetal force is proportional to square of the speed. We use this fact to find the new force for the new speed as shown below,

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