Question 1

The kinetic coefficient of friction is usually larger than the static coefficient of friction.

Accepted Answer

A) True 
 B)False

Question 2

Explain what is meant by a net or unbalanced force.

Accepted Answer

An unbalanced, or nonzero, net force alw

Question 3

A 4-kg mass and a 10-kg mass are acted on by the same constant net force during the same amount of time. Both masses are at rest before the force is applied. The 10-kg mass moves a distance X1 and the 4-kg mass moves a distance X2 as a result. Which one of the following statements is true?

Accepted Answer

A)  The ratio X1/X2 is equal to 5/2. 
B)  The ratio X1/X2 is equal to (5/2)2. 
C)  The ratio X1/X2 is equal to (2/5)2. 
D)  The ratio X1/X2 is equal to 2/5. 
E)  X1 is equal to X2. 
A)  The ratio X1/X2 is equal to 5/2. 
B)  The ratio X1/X2 is equal to (5/2)2. 
C)  The ratio X1/X2 is equal to (2/5)2. 
D)  The ratio X1/X2 is equal to 2/5. 
E)  X1 is equal to X2.

Question 4

An elevator weighing 10,000. N is supported by a steel cable. Determine the tension in the cable when the elevator is accelerated upward at 3.0 m/s2. (g = 9.8 m/s2)

Accepted Answer

A)  11. kN 
B)  40. kN 
C)  13. kN 
D)  10. kN 
E)  7.0 kN 
A)  11. kN 
B)  40. kN 
C)  13. kN 
D)  10. kN 
E)  7.0 kN

The kinetic coefficient of friction is usually larger than the static coefficient of friction.

Explain what is meant by a net or unbalanced force.

A 4-kg mass and a 10-kg mass are acted on by the same constant net force during the same amount of time. Both masses are at rest before the force is applied. The 10-kg mass moves a distance X₁ and the 4-kg mass moves a distance X₂ as a result. Which one of the following statements is true?

An elevator weighing 10,000. N is supported by a steel cable. Determine the tension in the cable when the elevator is accelerated upward at 3.0 m/s². (g = 9.8 m/s²)

Measurement and Problem Solving

Kinematics: Description of Motion

Motion in Two Dimensions

Work and Energy

Linear Momentum and Collisions

Circular Motion and Gravitation

Rotational Motion and Equilibrium

Solids and Fluids

Temperature and Kinetic Theory

Heat

Thermodynamics

Vibrations and Waves

Sound

Electric Charge, Forces, and Fields

Electric Potential, Energy, and Capacitance

Electric Current and Resistance

Basic Electric Circuits

Magnetism

Electromagnetic Induction and Waves

AC Circuits

Reflection and Refraction of Light

Mirrors and Lenses

Physical Optics: The Wave Nature of Light

Vision and Optical Instruments

Relativity

Quantum Physics

Quantum Mechanics and Atomic Physics

The Nucleus

Nuclear Reactions and Elementary Particles

Filters

Exam 4: Force and Motion

The kinetic coefficient of friction is usually larger than the static coefficient of friction.

Explain what is meant by a net or unbalanced force.

A 4-kg mass and a 10-kg mass are acted on by the same constant net force during the same amount of time. Both masses are at rest before the force is applied. The 10-kg mass moves a distance X1 and the 4-kg mass moves a distance X2 as a result. Which one of the following statements is true?

An elevator weighing 10,000. N is supported by a steel cable. Determine the tension in the cable when the elevator is accelerated upward at 3.0 m/s2. (g = 9.8 m/s2)

Measurement and Problem Solving

Kinematics: Description of Motion

Motion in Two Dimensions

Work and Energy

Linear Momentum and Collisions

Circular Motion and Gravitation

Rotational Motion and Equilibrium

Solids and Fluids

Temperature and Kinetic Theory

Heat

Thermodynamics

Vibrations and Waves

Sound

Electric Charge, Forces, and Fields

Electric Potential, Energy, and Capacitance

Electric Current and Resistance

Basic Electric Circuits

Magnetism

Electromagnetic Induction and Waves

AC Circuits

Reflection and Refraction of Light

Mirrors and Lenses

Physical Optics: The Wave Nature of Light

Vision and Optical Instruments

Relativity

Quantum Physics

Quantum Mechanics and Atomic Physics

The Nucleus

Nuclear Reactions and Elementary Particles

Filters

A 4-kg mass and a 10-kg mass are acted on by the same constant net force during the same amount of time. Both masses are at rest before the force is applied. The 10-kg mass moves a distance X₁ and the 4-kg mass moves a distance X₂ as a result. Which one of the following statements is true?

An elevator weighing 10,000. N is supported by a steel cable. Determine the tension in the cable when the elevator is accelerated upward at 3.0 m/s². (g = 9.8 m/s²)