SEARCH
You are in browse mode. You must login to use MEMORY

   Log in to start

level: The interaction of objects

Questions and Answers List

level questions: The interaction of objects

QuestionAnswer
Pairs of forces that occur when two objects interact. They are always of the same type, have the same size, and act in opposite directions.Action-Reaction Forces
What are action-reaction forces?Pairs of forces that occur when two objects interact, always of the same type, having the same size, and acting in opposite directions.
Forces that result from the physical interaction or touching of two objects.Contact Forces
What are contact forces?Forces that result from the physical interaction or touching of two objects.
Forces that act between objects without any physical interaction or direct contact.Non-contact Forces
What are non-contact forces?Forces that act between objects without any physical interaction or direct contact.
The equal and opposite forces in action-reaction force pairs.Force Pairs
What is the defining characteristic of force pairs in action-reaction forces?They are equal and opposite.
A quantity that has both magnitude (size) and direction, represented graphically with an arrow.Vector
How are forces represented graphically?Forces are represented as vectors with arrows indicating their size and direction.
The force created when one object pushes against another, always acting at right angles to the surface between the two objects.Normal Contact Force
What is the normal contact force?The force created when one object pushes against another, always acting at right angles to the surface between the two objects.
The force that acts to resist the motion or sliding of two objects past each other.Friction
What is friction?The force that acts to resist the motion or sliding of two objects past each other.
The frictional contact force that opposes the motion of an object as it moves through the air.Air Resistance
What is air resistance?The frictional force that opposes the motion of an object as it moves through the air.
The frictional contact force that opposes the motion of an object as it moves through water.Water Resistance
What is water resistance?The frictional force that opposes the motion of an object as it moves through water.
The non-contact force of attraction between two masses, such as the force between the Earth and an object.Gravitational Force
What is gravitational force?The force of attraction between two masses, such as the force between the Earth and an object.
The non-contact force between electrically charged objects, which can be attractive (opposite charges) or repulsive (like charges).Electrostatic Force
What is electrostatic force?The force between electrically charged objects, which can be attractive (opposite charges) or repulsive (like charges).
The non-contact force between magnets or magnetic objects.Magnetic Force
What is magnetic force?The force between magnets or magnetic objects.
The area around an object where it can exert a non-contact force on other objects.Force Field
What is a force field?The area around an object where it can exert a non-contact force on other objects.
The process of applying a substance (usually oil) to reduce friction between moving parts in a mechanical system.Lubrication
What is lubrication?Lubrication is the process of applying a substance (usually oil) to reduce friction between moving parts in a mechanical system.
Energy that is transferred to less useful forms, often in the form of heat.Dissipated Energy
What is dissipated energy?Dissipated energy is energy that is transferred to less useful forms, often in the form of heat.
Energy that is not used for a useful purpose in a system.Wasted Energy
What is wasted energy?Wasted energy is energy that is not used for a useful purpose in a system.
The ratio of useful energy output to the total energy input in a system.Energy Efficiency
What is energy efficiency?Energy efficiency is the ratio of useful energy output to the total energy input in a system.