EASY
JEE Main
IMPORTANT
Earn 100

Suppose the coefficient of static friction between the road and the tires on a car is 0.60 and the car has no negative lift. What speed will put the car on the verge of sliding as it rounds a level curve of 32.0 m radius?

Important Questions on Force and Motion-II

HARD
JEE Main
IMPORTANT
Principles Of Physics International Student Version>Chapter 6 - Force and Motion-II>Problems>Q 43
What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 35 km h-1 and the μs between tires and track is 0.40?
EASY
JEE Main
IMPORTANT
Principles Of Physics International Student Version>Chapter 6 - Force and Motion-II>Problems>Q 44
During an Olympic bobsled run, the Jamaican team makes a turn of radius 7.6 m at a speed of 96.6 km/h. What is their acceleration in terms of g?
HARD
JEE Main
IMPORTANT
Principles Of Physics International Student Version>Chapter 6 - Force and Motion-II>Problems>Q 45
A student of weight 667 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force F→N on the student from the seat is 556 N. (a) Does the student feel 'light' or 'heavy' there? (b) What is the magnitude of F→N at the lowest point? If the wheel's speed is doubled, what is the magnitude FN at the (c) highest and (d) the lowest point?
HARD
JEE Main
IMPORTANT
Principles Of Physics International Student Version>Chapter 6 - Force and Motion-II>Problems>Q 46
A police officer in hot pursuit drives her car through a circular turn of radius 300 m with a constant speed of 75.0 km/h. Her mass is 55.0 kg. What are (a) the magnitude and (b) the angle (relative to vertical) of the net force of the officer on the car seat? (Hint: Consider both horizontal and vertical forces)
MEDIUM
JEE Main
IMPORTANT
Principles Of Physics International Student Version>Chapter 6 - Force and Motion-II>Problems>Q 47
A circular-motion addict of mass 80 kg rides a Ferris wheel around in a vertical circle of radius 12 m at a constant speed of 5.5 m/s. (a) What is the period of the motion? What is the magnitude of the normal force on the addict from the seat when both go through (b) the highest point of the circular path and (c) the lowest point?
MEDIUM
JEE Main
IMPORTANT
Principles Of Physics International Student Version>Chapter 6 - Force and Motion-II>Problems>Q 48
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 of radius 20 m, its speed is not changing. At the top of the hill, what are the (a) magnitude FN and (b) direction (up or down) of the normal force on the car from the track if the car's speed is v=11 m/s? What are (c) FN and (d) the direction if v=14 m/s?
HARD
JEE Main
IMPORTANT
Principles Of Physics International Student Version>Chapter 6 - Force and Motion-II>Problems>Q 49

In the figure shown below, a car is driven at constant speed over a circular hill and then into a circular valley with the same radius. At the top of the hill, the normal force on the driver from the car seat is 0. The driver's mass is 80.0 kg. What is the magnitude of the normal force on the driver from the seat when the car passes through the bottom of the valley?

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HARD
JEE Main
IMPORTANT
Principles Of Physics International Student Version>Chapter 6 - Force and Motion-II>Problems>Q 50

An 85.0 kg passenger is made to move along a circular path of radius r=3.50 m in uniform circular motion. (a) Figure (a) is a plot of the required magnitude F of the net centripetal force for a range of possible values of the passenger's speed v. What is the plot's slope at v=8.30 m s-1? (b) Figure (b) is a plot of F for a range of possible values of T, the period of the motion. What is the plot's slope at T=2.50 s? 

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