Question 1

The system in the figure consists of a steel ball attached by a cord to a large block of wood. If the system is dropped in a vacuum, the force in the cord is

Accepted Answer

A)  zero. 
B)  equal to the difference of the masses of B and W. 
C)  equal to the difference of the weights of B and W. 
D)  equal to the weight of B. 
E)  equal to the sum of the weights of B and W. 
A)  zero. 
B)  equal to the difference of the masses of B and W. 
C)  equal to the difference of the weights of B and W. 
D)  equal to the weight of B. 
E)  equal to the sum of the weights of B and W.

Question 2

An inertial reference frame is one in which

Accepted Answer

A)  Newton's first law describes the behavior of matter. 
B)  the law of inertia is not applicable. 
C)  there is a great deal of matter. 
D)  the object of interest is traveling in a circular path. 
E)  forces do not necessarily exist in pairs. 
A)  Newton's first law describes the behavior of matter. 
B)  the law of inertia is not applicable. 
C)  there is a great deal of matter. 
D)  the object of interest is traveling in a circular path. 
E)  forces do not necessarily exist in pairs.

Question 3

A car is accelerating at a rate of 2.5 m/s2. A mass of 250 g is hanging from the ceiling on a string 1.2 m long. The angle that the string makes with the vertical is

Accepted Answer

A)  14.3º toward the back of the car. 
B)  76º toward the back of the car. 
C)  7º toward the front of the car. 
D)  14.3º toward the front of the car. 
E)  0º, or straight down. 
A)  14.3º toward the back of the car. 
B)  76º toward the back of the car. 
C)  7º toward the front of the car. 
D)  14.3º toward the front of the car. 
E)  0º, or straight down.

Question 4

Three boxes are connected by stretchless strings and are pulled by a force   as shown in the figure. Which box has the greatest acceleration?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  they all have the same acceleration 
E)  the accelerations of B and C are greater than that of A 
A)  A 
B)  B 
C)  C 
D)  they all have the same acceleration 
E)  the accelerations of B and C are greater than that of A

Question 5

A force of F = 90 N is exerted on mass m1 as shown. Both m1 and m2 accelerate to the right at 3 m/s2 along the frictionless surface. The force F makes an angle of 25 degrees to the horizontal. Calculate the force that the horizontal surface exerts on mass m1. (m2 = 10 kg)

Accepted Answer

A)  2.5 $\times$ 102 N 
B)  1.5 $\times$ 102 N 
C)  82 N 
D)  3.5 $\times$ 102 N 
E)  2.1 $\times$ 102 N 
A)  2.5 $\times$ 102 N 
B)  1.5 $\times$ 102 N 
C)  82 N 
D)  3.5 $\times$ 102 N 
E)  2.1 $\times$ 102 N

Question 6

The word "normal," as it applies to forces, means

Accepted Answer

A)  usual. 
B)  mean. 
C)  average. 
D)  perpendicular. 
E)  straight up, in the direction opposite to the force of gravity. 
A)  usual. 
B)  mean. 
C)  average. 
D)  perpendicular. 
E)  straight up, in the direction opposite to the force of gravity.

Question 7

Of the following values, which is most nearly equal to the weight of a 1-kg body?

Accepted Answer

A)  1 N 
B)  103 dynes 
C)  2.2 lb 
D)  0.454 lb 
E)  2.2 N 
A)  1 N 
B)  103 dynes 
C)  2.2 lb 
D)  0.454 lb 
E)  2.2 N

Question 8

Two boxes m1 and m2 are connected by a lightweight cord and sitting on a frictionless surface. A horizontal force of 66 N pulls on box m1 and then m2 is pulled along. If the acceleration of both boxes is 2.2 m/s2 and the mass of m1 is 12 kg, find the mass of m2.

Accepted Answer

A)  12 kg 
B)  18 kg 
C)  30 kg 
D)  48 kg 
E)  42 kg 
A)  12 kg 
B)  18 kg 
C)  30 kg 
D)  48 kg 
E)  42 kg

Question 9

A particle of mass 1.3 kg is sliding down a frictionless slope inclined at 30º to the horizontal. The acceleration of the particle down the slope is

Accepted Answer

A)  1.3 m/s2  
B)  9.8 m/s2  
C)  0.5 m/s2  
D)  8.5 m/s2  
E)  4.9 m/s2  
A)  1.3 m/s2  
B)  9.8 m/s2  
C)  0.5 m/s2  
D)  8.5 m/s2  
E)  4.9 m/s2

Question 10

A large (15,000-kg) military helicopter lifts a 6000-kg truck straight up out of a danger zone with an acceleration of 4 m/s2. Calculate the tension in the lifting cable.

Accepted Answer

A)  3.5 $\times$ 104 N 
B)  8.3 $\times$ 104 N 
C)  2.1 $\times$ 102 N 
D)  5.9 $\times$ 104 N 
E)  2.4 $\times$ 104 N 
A)  3.5 $\times$ 104 N 
B)  8.3 $\times$ 104 N 
C)  2.1 $\times$ 102 N 
D)  5.9 $\times$ 104 N 
E)  2.4 $\times$ 104 N

Question 11

A ball of mass 2.0 kg is acted on by two forces,   and   . The magnitude of the acceleration is

Accepted Answer

A)  2.5 m/s2 
B)  3.9 m/s2 
C)  4.6 m/s2 
D)  5.1 m/s2 
E)  5.8 m/s2 
A)  2.5 m/s2 
B)  3.9 m/s2 
C)  4.6 m/s2 
D)  5.1 m/s2 
E)  5.8 m/s2

Question 12

A net force of 64 N acts on a mass of 16 kg. The resulting acceleration is

Accepted Answer

A)  16 m/s2  
B)  0.51 m/s2  
C)  64 m/s2  
D)  9.0 m/s2  
E)  4.0 m/s2  
A)  16 m/s2  
B)  0.51 m/s2  
C)  64 m/s2  
D)  9.0 m/s2  
E)  4.0 m/s2

Question 13

An object with a mass M = 250 g is on a plane inclined at 30º above the horizontal and is attached by a string to a mass m = 150 g. There is no friction and mass m hangs freely and is initially at rest. When mass m has descended a distance h = 10 cm, its speed will be

Accepted Answer

A)  35.0 cm/s 
B)  7.00 cm/s 
C)  140 cm/s 
D)  110 cm/s 
E)  70.0 cm/s 
A)  35.0 cm/s 
B)  7.00 cm/s 
C)  140 cm/s 
D)  110 cm/s 
E)  70.0 cm/s

Question 14

What is the weight of a 50-kg boy on the moon, where the acceleration due to gravity is 1.6 m/s2?

Accepted Answer

A)  80 N 
B)  100 N 
C)  490 N 
D)  50 N 
E)  80 lb 
A)  80 N 
B)  100 N 
C)  490 N 
D)  50 N 
E)  80 lb

Question 15

A horse exerts a force F on a cart, causing the cart to move with increasing speed. What force does the cart exert on the horse?

Accepted Answer

A)  zero 
B)  F 
C)  greater than F 
D)  less than F 
E)  The force cannot be determined unless the acceleration is given. 
A)  zero 
B)  F 
C)  greater than F 
D)  less than F 
E)  The force cannot be determined unless the acceleration is given.

Question 16

Which of the following is not a unit of mass?

Accepted Answer

A)  pound 
B)  kilogram 
C)  gram 
D)  slug 
E)  milligram 
A)  pound 
B)  kilogram 
C)  gram 
D)  slug 
E)  milligram

Question 17

Three boxes are connected by stretchless strings and are pulled by a force   as shown in the figure. Which string has to be the strongest so as not to break?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  A, B, and C must be equally strong. 
E)  A and B must be equally strong. 
A)  A 
B)  B 
C)  C 
D)  A, B, and C must be equally strong. 
E)  A and B must be equally strong.

The system in the figure consists of a steel ball attached by a cord to a large block of wood. If the system is dropped in a vacuum, the force in the cord is

An inertial reference frame is one in which

A car is accelerating at a rate of 2.5 m/s². A mass of 250 g is hanging from the ceiling on a string 1.2 m long. The angle that the string makes with the vertical is

Three boxes are connected by stretchless strings and are pulled by a force as shown in the figure. Which box has the greatest acceleration?

A force of F = 90 N is exerted on mass m₁ as shown. Both m₁ and m₂ accelerate to the right at 3 m/s² along the frictionless surface. The force F makes an angle of 25 degrees to the horizontal. Calculate the force that the horizontal surface exerts on mass m₁. (m₂ = 10 kg)

The word "normal," as it applies to forces, means

Of the following values, which is most nearly equal to the weight of a 1-kg body?

Two boxes m₁ and m₂ are connected by a lightweight cord and sitting on a frictionless surface. A horizontal force of 66 N pulls on box m₁ and then m₂ is pulled along. If the acceleration of both boxes is 2.2 m/s² and the mass of m₁ is 12 kg, find the mass of m₂.

A particle of mass 1.3 kg is sliding down a frictionless slope inclined at 30º to the horizontal. The acceleration of the particle down the slope is

A large (15,000-kg) military helicopter lifts a 6000-kg truck straight up out of a danger zone with an acceleration of 4 m/s². Calculate the tension in the lifting cable.

A ball of mass 2.0 kg is acted on by two forces, and . The magnitude of the acceleration is

A net force of 64 N acts on a mass of 16 kg. The resulting acceleration is

An object with a mass M = 250 g is on a plane inclined at 30º above the horizontal and is attached by a string to a mass m = 150 g. There is no friction and mass m hangs freely and is initially at rest. When mass m has descended a distance h = 10 cm, its speed will be

What is the weight of a 50-kg boy on the moon, where the acceleration due to gravity is 1.6 m/s²?

A horse exerts a force F on a cart, causing the cart to move with increasing speed. What force does the cart exert on the horse?

Which of the following is not a unit of mass?

Three boxes are connected by stretchless strings and are pulled by a force as shown in the figure. Which string has to be the strongest so as not to break?

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

Filters

Exam 4: Newtons Laws

The system in the figure consists of a steel ball attached by a cord to a large block of wood. If the system is dropped in a vacuum, the force in the cord is

An inertial reference frame is one in which

A car is accelerating at a rate of 2.5 m/s2. A mass of 250 g is hanging from the ceiling on a string 1.2 m long. The angle that the string makes with the vertical is

Three boxes are connected by stretchless strings and are pulled by a force as shown in the figure. Which box has the greatest acceleration?

A force of F = 90 N is exerted on mass m1 as shown. Both m1 and m2 accelerate to the right at 3 m/s2 along the frictionless surface. The force F makes an angle of 25 degrees to the horizontal. Calculate the force that the horizontal surface exerts on mass m1. (m2 = 10 kg)

The word "normal," as it applies to forces, means

Of the following values, which is most nearly equal to the weight of a 1-kg body?

Two boxes m1 and m2 are connected by a lightweight cord and sitting on a frictionless surface. A horizontal force of 66 N pulls on box m1 and then m2 is pulled along. If the acceleration of both boxes is 2.2 m/s2 and the mass of m1 is 12 kg, find the mass of m2.

A particle of mass 1.3 kg is sliding down a frictionless slope inclined at 30º to the horizontal. The acceleration of the particle down the slope is

A large (15,000-kg) military helicopter lifts a 6000-kg truck straight up out of a danger zone with an acceleration of 4 m/s2. Calculate the tension in the lifting cable.

A ball of mass 2.0 kg is acted on by two forces, and . The magnitude of the acceleration is

A net force of 64 N acts on a mass of 16 kg. The resulting acceleration is

An object with a mass M = 250 g is on a plane inclined at 30º above the horizontal and is attached by a string to a mass m = 150 g. There is no friction and mass m hangs freely and is initially at rest. When mass m has descended a distance h = 10 cm, its speed will be

What is the weight of a 50-kg boy on the moon, where the acceleration due to gravity is 1.6 m/s2?

A horse exerts a force F on a cart, causing the cart to move with increasing speed. What force does the cart exert on the horse?

Which of the following is not a unit of mass?

Three boxes are connected by stretchless strings and are pulled by a force as shown in the figure. Which string has to be the strongest so as not to break?

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

Thermal Properties and Processes

Filters

A car is accelerating at a rate of 2.5 m/s². A mass of 250 g is hanging from the ceiling on a string 1.2 m long. The angle that the string makes with the vertical is

A force of F = 90 N is exerted on mass m₁ as shown. Both m₁ and m₂ accelerate to the right at 3 m/s² along the frictionless surface. The force F makes an angle of 25 degrees to the horizontal. Calculate the force that the horizontal surface exerts on mass m₁. (m₂ = 10 kg)

Two boxes m₁ and m₂ are connected by a lightweight cord and sitting on a frictionless surface. A horizontal force of 66 N pulls on box m₁ and then m₂ is pulled along. If the acceleration of both boxes is 2.2 m/s² and the mass of m₁ is 12 kg, find the mass of m₂.

A large (15,000-kg) military helicopter lifts a 6000-kg truck straight up out of a danger zone with an acceleration of 4 m/s². Calculate the tension in the lifting cable.

What is the weight of a 50-kg boy on the moon, where the acceleration due to gravity is 1.6 m/s²?