Question 1

Which of the following is a vector quantity?

Accepted Answer

A)  volume 
B)  force 
C)  speed 
D)  time 
E)  length 
A)  volume 
B)  force 
C)  speed 
D)  time 
E)  length

Question 2

The fundamental force that binds the electrons to the nuclei to form atoms is the

Accepted Answer

A)  strong force. 
B)  weak force. 
C)  electromagnetic force. 
D)  gravitational force. 
A)  strong force. 
B)  weak force. 
C)  electromagnetic force. 
D)  gravitational force.

Question 3

Three objects experience interactions. Object A has mass, object B has electrical charge, and object C has both mass and electrical charge. Which of the following statements is true?

Accepted Answer

A)  The electrical force on A due to B has a greater magnitude than the gravitational force on B due to A. 
B)  The electrical force on A due to B has a smaller magnitude than the gravitational force on B due to A. 
C)  The gravitational force on C due to A has the same magnitude as the gravitational force on A due to C. 
D)  The electrical force on C due to B has the same magnitude as the gravitational force on C due to B. 
A)  The electrical force on A due to B has a greater magnitude than the gravitational force on B due to A. 
B)  The electrical force on A due to B has a smaller magnitude than the gravitational force on B due to A. 
C)  The gravitational force on C due to A has the same magnitude as the gravitational force on A due to C. 
D)  The electrical force on C due to B has the same magnitude as the gravitational force on C due to B.

Question 4

A rock of weight 17.5 N, suspended from a spring scale, is immersed in a beaker of water. The scale reads 9.00 N. The weight of the beaker and water together (without the rock) is 23.5 N. What is the magnitude of the net force of the beaker on the table after the rock has been submerged?

Accepted Answer

A)  17.5 N 
B)  23.5 N 
C)  32.0 N 
D)  41.0 N 
A)  17.5 N 
B)  23.5 N 
C)  32.0 N 
D)  41.0 N

Question 5

The Moon (mass 7.35 × 1022 kg) orbits the Earth (mass 5.98 × 1024 kg) at a distance of 3.85 × 108 meters. Meanwhile, the Earth orbits the Sun (mass 1.99 × 1030 kg) at a distance of 1.50 × 1011 meters. When the Moon is directly between the Earth and the Sun, what is the gravitational field at the location of the Moon due to the Earth and the Sun combined? (G = 6.67 × 10-11 N m2/kg2)

Accepted Answer

A)  5.93 × 10-3 N/kg toward the Sun 
B)  5.93 × 10-3 N/kg toward the Earth 
C)  3.21 × 10-3 N/kg toward the Sun 
D)  3.21 × 10-3 N/kg toward the Earth 
E)  2.69 × 10-3 N/kg toward the Earth 
A)  5.93 × 10-3 N/kg toward the Sun 
B)  5.93 × 10-3 N/kg toward the Earth 
C)  3.21 × 10-3 N/kg toward the Sun 
D)  3.21 × 10-3 N/kg toward the Earth 
E)  2.69 × 10-3 N/kg toward the Earth

Question 6

Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m1, has a mass of 6.0 kg and the other mass, m2, has a mass of 4.0 kg. The force of the cord attached to m1 is about

Accepted Answer

A)  47 N upward. 
B)  47 N downward. 
C)  33 N upward. 
D)  33 N downward. 
E)  15 N upward. 
A)  47 N upward. 
B)  47 N downward. 
C)  33 N upward. 
D)  33 N downward. 
E)  15 N upward.

Question 7

When a person stands on a scale, which of the following is not a force exerted on the scale?

Accepted Answer

A)  a contact force due to the floor 
B)  a contact force due to the person's feet 
C)  the weight of the person 
D)  the weight of the scale 
A)  a contact force due to the floor 
B)  a contact force due to the person's feet 
C)  the weight of the person 
D)  the weight of the scale

Question 8

Two masses are connected by a cord that passes over a pulley as shown in the figure. The pulley and cord have negligible mass and m2 (2.0 kg) moves on a horizontal surface without friction, while m1 (2.0 kg) is suspended vertically. What is the acceleration of m1?

Accepted Answer

A)  3.9 m/s2 downward 
B)  12 m/s2 downward 
C)  6.0 m/s2 downward 
D)  4.9 m/s2 downward 
A)  3.9 m/s2 downward 
B)  12 m/s2 downward 
C)  6.0 m/s2 downward 
D)  4.9 m/s2 downward

Question 9

Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m1, has a mass of 5.0 kg and the other mass, m2, has a mass of 3.0 kg. The acceleration of m1 is

Accepted Answer

A)  3.3 m/s2 upward. 
B)  3.3 m/s2 downward. 
C)  2.5 m/s2 upward. 
D)  2.5 m/s2 downward. 
E)  1.1 m/s2 upward. 
A)  3.3 m/s2 upward. 
B)  3.3 m/s2 downward. 
C)  2.5 m/s2 upward. 
D)  2.5 m/s2 downward. 
E)  1.1 m/s2 upward.

Question 10

A tractor T is pulling a trailer M with a constant acceleration. If the forward acceleration is 0.50 m/s2 and M = 400 kg and T = 500 kg, then the horizontal force on the tractor due to the ground is (ignore air resistance)

Accepted Answer

A)  450 N forward. 
B)  450 N backward. 
C)  250 N forward. 
D)  250 N backward. 
E)  200 N forward. 
A)  450 N forward. 
B)  450 N backward. 
C)  250 N forward. 
D)  250 N backward. 
E)  200 N forward.

Question 11

An airplane is flying in horizontal flight at a constant velocity. The weight of the airplane is 40,000 N. The wings produce a lift force that is perpendicular to the wings and a drag force that is parallel to the wings. The engine produces a forward thrust force of 2,000 N. Which of the following statements is true?

Accepted Answer

A)  The lift force on the airplane is zero. 
B)  The drag force on the airplane is zero. 
C)  The lift force on the airplane is 42,000 N upward. 
D)  The drag force on the airplane is 38,000 N downward. 
E)  The drag force on the airplane is 2,000 N backward. 
A)  The lift force on the airplane is zero. 
B)  The drag force on the airplane is zero. 
C)  The lift force on the airplane is 42,000 N upward. 
D)  The drag force on the airplane is 38,000 N downward. 
E)  The drag force on the airplane is 2,000 N backward.

Question 12

In the figure, an airport luggage carrying train with a tractor T is pulling three luggage carts, M1, M2, and M3, with constant velocity of 4.5 m/s. If T = 300 kg, M1 = 200 kg, M2 = 100 kg, and M3 = 100 kg (there is no friction), then the force in the connection between the tractor T and cart M1 is

Accepted Answer

A)  980 N. 
B)  560 N. 
C)  280 N. 
D)  140 N. 
E)  0.00 N. 
A)  980 N. 
B)  560 N. 
C)  280 N. 
D)  140 N. 
E)  0.00 N.

Question 13

If an object of mass 20 kg on Earth is sent to the Moon, it will have a mass of

Accepted Answer

A)  10 kg. 
B)  20 kg. 
C)  0.0 kg. 
D)  4.0 kg. 
A)  10 kg. 
B)  20 kg. 
C)  0.0 kg. 
D)  4.0 kg.

Question 14

Two masses are being pulled up a 30.0 degree incline by a force F parallel to the incline. The acceleration up the incline is 1.00 m/s2 and the velocity is down the incline. The force is applied to a 200 kg mass and a string connects the 200 kg mass to a 150 kg mass. The coefficient of kinetic friction is 0.200. The force F is

Accepted Answer

A)  2,660 N. 
B)  1,530 N. 
C)  1,470 N. 
D)  980 N. 
E)  750 N. 
A)  2,660 N. 
B)  1,530 N. 
C)  1,470 N. 
D)  980 N. 
E)  750 N.

Question 15

An object travels 7.5 m/s toward the west. Under the influence of a constant net force of 5.2 kN, it comes to rest in 3.2 s. What is its mass?

Accepted Answer

A)  2200 kg 
B)  1600 kg 
C)  1100 kg 
D)  690 kg 
A)  2200 kg 
B)  1600 kg 
C)  1100 kg 
D)  690 kg

Question 16

The weight of a 1.00 kg object on the surface of the Moon is (G = 6.67 × 10-11 N m2/kg2, the radius of the Moon is 1.74 × 106 m, and the mass of the Moon is 7.35 × 1022 kg)

Accepted Answer

A)  9.80 N. 
B)  7.59 N. 
C)  1.62 N. 
D)  0.981 N. 
E)  0.548 N. 
A)  9.80 N. 
B)  7.59 N. 
C)  1.62 N. 
D)  0.981 N. 
E)  0.548 N.

Question 17

An object of mass m is hanging by a string from the roof of an elevator. The elevator is moving up at a constant speed. What is the tension in the string?

Accepted Answer

A)  greater than mg 
B)  less than mg 
C)  equal to mg 
D)  depends on the speed of the elevator 
A)  greater than mg 
B)  less than mg 
C)  equal to mg 
D)  depends on the speed of the elevator

Question 18

An airplane flies with a constant speed at an angle of 25 degrees below the horizontal, in a straight line. Which statement below is not true?

Accepted Answer

A)  The thrust is greater in magnitude than the drag. 
B)  The weight is greater in magnitude than the lift. 
C)  The net force on the plane is zero 
D)  The plane has constant velocity. 
A)  The thrust is greater in magnitude than the drag. 
B)  The weight is greater in magnitude than the lift. 
C)  The net force on the plane is zero 
D)  The plane has constant velocity.

Question 19

When a force is called a "normal" force, it is

Accepted Answer

A)  the usual force expected given the arrangement of a system. 
B)  a force that is perpendicular to the surface of the Earth at any given location. 
C)  a force that is always vertical. 
D)  a contact force perpendicular to the contact surfaces between two objects. 
E)  the net force acting on a system. 
A)  the usual force expected given the arrangement of a system. 
B)  a force that is perpendicular to the surface of the Earth at any given location. 
C)  a force that is always vertical. 
D)  a contact force perpendicular to the contact surfaces between two objects. 
E)  the net force acting on a system.

Question 20

On the way to lower floors, an elevator begins its descent from rest with a constant acceleration, descending the first 5.0 m in 1.85 s. What is the apparent weight of a 75 kg man inside the accelerator during this time interval?

Accepted Answer

A)  0.74 kN 
B)  0.52 kN 
C)  0.11 kN 
D)  1.0 kN 
A)  0.74 kN 
B)  0.52 kN 
C)  0.11 kN 
D)  1.0 kN

Exam 4: Force and Newtons Laws of Motion

Which of the following is a vector quantity?

The fundamental force that binds the electrons to the nuclei to form atoms is the

Three objects experience interactions. Object A has mass, object B has electrical charge, and object C has both mass and electrical charge. Which of the following statements is true?

A rock of weight 17.5 N, suspended from a spring scale, is immersed in a beaker of water. The scale reads 9.00 N. The weight of the beaker and water together (without the rock) is 23.5 N. What is the magnitude of the net force of the beaker on the table after the rock has been submerged?

Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m1, has a mass of 6.0 kg and the other mass, m2, has a mass of 4.0 kg. The force of the cord attached to m1 is about

When a person stands on a scale, which of the following is not a force exerted on the scale?

Two masses are connected by a cord that passes over a pulley as shown in the figure. The pulley and cord have negligible mass and m2 (2.0 kg) moves on a horizontal surface without friction, while m1 (2.0 kg) is suspended vertically. What is the acceleration of m1?

Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m1, has a mass of 5.0 kg and the other mass, m2, has a mass of 3.0 kg. The acceleration of m1 is

A tractor T is pulling a trailer M with a constant acceleration. If the forward acceleration is 0.50 m/s2 and M = 400 kg and T = 500 kg, then the horizontal force on the tractor due to the ground is (ignore air resistance)

In the figure, an airport luggage carrying train with a tractor T is pulling three luggage carts, M1, M2, and M3, with constant velocity of 4.5 m/s. If T = 300 kg, M1 = 200 kg, M2 = 100 kg, and M3 = 100 kg (there is no friction), then the force in the connection between the tractor T and cart M1 is

If an object of mass 20 kg on Earth is sent to the Moon, it will have a mass of

An object travels 7.5 m/s toward the west. Under the influence of a constant net force of 5.2 kN, it comes to rest in 3.2 s. What is its mass?

The weight of a 1.00 kg object on the surface of the Moon is (G = 6.67 × 10-11 N m2/kg2, the radius of the Moon is 1.74 × 106 m, and the mass of the Moon is 7.35 × 1022 kg)

An object of mass m is hanging by a string from the roof of an elevator. The elevator is moving up at a constant speed. What is the tension in the string?

An airplane flies with a constant speed at an angle of 25 degrees below the horizontal, in a straight line. Which statement below is not true?

When a force is called a "normal" force, it is

On the way to lower floors, an elevator begins its descent from rest with a constant acceleration, descending the first 5.0 m in 1.85 s. What is the apparent weight of a 75 kg man inside the accelerator during this time interval?

Introduction

Motion Along a Line

Motion in a Plane

Circular Motion

Conservation of Energy

Linear Momentum

Torque and Angular Momentum

Fluids

Elasticity and Oscillations

Waves

Sound

Temperature and the Ideal Gas

Heat

Thermodynamics

Electric Forces and Fields

Electric Potential

Electric Current and Circuits

Magnetic Forces and Fields

Electromagnetic Induction

Alternating Current

Electromagnetic Waves

Reflection and Refraction of Light

Optical Instruments

Interference and Diffraction

Relativity

Early Quantum Physics and the Photon

Quantum Physics

Nuclear Physics

Particle Physics

Filters

Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m₁, has a mass of 6.0 kg and the other mass, m₂, has a mass of 4.0 kg. The force of the cord attached to m₁ is about

Two masses are connected by a cord that passes over a pulley as shown in the figure. The pulley and cord have negligible mass and m₂ (2.0 kg) moves on a horizontal surface without friction, while m₁ (2.0 kg) is suspended vertically. What is the acceleration of m₁?

Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m₁, has a mass of 5.0 kg and the other mass, m₂, has a mass of 3.0 kg. The acceleration of m₁ is

A tractor T is pulling a trailer M with a constant acceleration. If the forward acceleration is 0.50 m/s² and M = 400 kg and T = 500 kg, then the horizontal force on the tractor due to the ground is (ignore air resistance)

The weight of a 1.00 kg object on the surface of the Moon is (G = 6.67 × 10^-11 N m²/kg², the radius of the Moon is 1.74 × 10⁶ m, and the mass of the Moon is 7.35 × 10²² kg)