Newton's Third Law Quiz

According to Newton's third law, what is the relationship between the force exerted by object A on object B, and the force exerted by object B on object A?

• The forces are equal in magnitude and opposite in direction
• The forces are unrelated to each other
• The forces are equal in magnitude and in the same direction
• The forces are unequal in magnitude and opposite in direction

A person is standing on a skateboard. The skateboard is on a frictionless surface. The person pushes against a wall. According to Newton's third law, what happens?

• The person and skateboard move away from the wall
• The wall moves away from the person and skateboard
• Nothing happens, as there is no net force
• The person and skateboard remain stationary

A book is resting on a table. Which force pair best represents the interaction between the book and the table?

• The table pushes up on the book, and the book pushes down on the table
• The table exerts no force on the book, and the book exerts no force on the table
• The table pulls up on the book, and the book pulls down on the table
• The table exerts a horizontal force on the book, and the book exerts an equal horizontal force on the table

A person is standing on a skateboard on a frictionless surface. The person pushes against a wall. According to Newton's third law, what is the reaction force?

• The wall pushes back on the person
• The skateboard pushes back on the person
• The floor pushes up on the skateboard
• There is no reaction force, as the wall is stationary

A box is sliding across a rough floor with constant velocity. Which of the following statements is true about the forces acting on the box?

• The applied force is greater than the frictional force
• The applied force is less than the frictional force
• The applied force is equal to the frictional force
• There is no applied force, only the frictional force

A person is standing on a skateboard on a frictionless surface. The person pushes against a wall. According to Newton's third law, what is the direction of the reaction force on the person?

• The reaction force on the person is in the same direction as the person's push on the wall
• The reaction force on the person is in the opposite direction of the person's push on the wall
• The reaction force on the person is perpendicular to the person's push on the wall
• There is no reaction force on the person

A book is resting on a table. The normal force acting on the book is:

• The force the book exerts downward on the table
• The force the table exerts upward on the book
• The force of gravity acting on the book
• The force the book exerts horizontally on the table

A person is pulling a box across a rough floor at constant velocity. The tension force in the rope is:

• Greater than the frictional force
• Less than the frictional force
• Equal to the frictional force
• Zero

A spring is compressed by a certain distance. According to Hooke's law, the force exerted by the spring is:

• Proportional to the square of the displacement
• Proportional to the square root of the displacement
• Proportional to the displacement
• Independent of the displacement

A block is sliding down a rough inclined plane at constant velocity. The frictional force acting on the block is:

• Greater than the component of the block's weight parallel to the incline
• Less than the component of the block's weight parallel to the incline
• Equal to the component of the block's weight parallel to the incline
• Zero