Question 1

The banking angle for a properly banked curve does not depend on the mass of the car going over it.

Accepted Answer

A) True 
 B)False

Question 2

The banking of curves increases the chance of skidding.

Accepted Answer

A) True 
 B)False

Question 3

What is the terminal velocity of an 80.00-kg mass object in falling with a drag force with a magnitude that depends on speed, v, as Fdrag = (12.0 N∙s/m)v + (4.00 N∙s/m)v2?

Accepted Answer

A) 6.45 m/s 
B) 72.2 m/s 
C) 34.2 m/s 
D) 12.6 m/s 
E) 47.3 m/s 
A) 6.45 m/s 
B) 72.2 m/s 
C) 34.2 m/s 
D) 12.6 m/s 
E) 47.3 m/s

Question 4

A car goes around a curve at a constant speed. What is the direction of the net force on the car?

Accepted Answer

A) toward the curve's center 
B) away from the curve's center 
C) toward the front of the car 
D) toward the back of the car 
E) the net force is zero 
A) toward the curve's center 
B) away from the curve's center 
C) toward the front of the car 
D) toward the back of the car 
E) the net force is zero

Question 5

A 600-kg car is going around a curve with a radius of 120 m that is banked at an angle of 25.0° with a speed of 30.0 m/s. The coefficient of static friction between the car and the road is 0.300. What is the force exerted by friction on the car?

Accepted Answer

A) 1590 N 
B) 3430 N 
C) 7240 N 
D) 7820 N 
E) 795 N 
A) 1590 N 
B) 3430 N 
C) 7240 N 
D) 7820 N 
E) 795 N

Question 6

FIGURE 5-5  
-A box is sliding down an incline tilted at an angle 14.0° above horizontal. The box is sliding down the incline at a speed of 1.70 m/s. The coefficient of kinetic friction between the box and the incline is 0.380. How far does the box slide down the incline before coming to rest?

Accepted Answer

A) 1.16 m 
B) 2.33 m 
C) 1.78 m 
D) 0.720 m 
E) The box does not stop. It accelerates down the plane. 
A) 1.16 m 
B) 2.33 m 
C) 1.78 m 
D) 0.720 m 
E) The box does not stop. It accelerates down the plane.

Question 7

The drag force is independent of the velocity of the object.

Accepted Answer

A) True 
 B)False

Question 8

FIGURE 5-1  
-What type of acceleration does an object moving with constant speed in a circular path experience?

Accepted Answer

A) free fall. 
B) terminal acceleration. 
C) constant acceleration. 
D) linear acceleration. 
E) centripetal acceleration. 
A) free fall. 
B) terminal acceleration. 
C) constant acceleration. 
D) linear acceleration. 
E) centripetal acceleration.

Exam 5: Using Newtons Laws: Friction, Circular Motion, Drag Forces

The banking angle for a properly banked curve does not depend on the mass of the car going over it.

The banking of curves increases the chance of skidding.

What is the terminal velocity of an 80.00-kg mass object in falling with a drag force with a magnitude that depends on speed, v, as Fdrag = (12.0 N∙s/m)v + (4.00 N∙s/m)v2?

A car goes around a curve at a constant speed. What is the direction of the net force on the car?

A 600-kg car is going around a curve with a radius of 120 m that is banked at an angle of 25.0° with a speed of 30.0 m/s. The coefficient of static friction between the car and the road is 0.300. What is the force exerted by friction on the car?

FIGURE 5-5 -A box is sliding down an incline tilted at an angle 14.0° above horizontal. The box is sliding down the incline at a speed of 1.70 m/s. The coefficient of kinetic friction between the box and the incline is 0.380. How far does the box slide down the incline before coming to rest?

The drag force is independent of the velocity of the object.

FIGURE 5-1 -What type of acceleration does an object moving with constant speed in a circular path experience?

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What is the terminal velocity of an 80.00-kg mass object in falling with a drag force with a magnitude that depends on speed, v, as F_drag = (12.0 N∙s/m)v + (4.00 N∙s/m)v²?