Lesson 3 Forces Review

A push or pull between objects.

• Force

• Friction

• Newton (N)

• Vector Quantity

A force that opposes the motion of an object.

• Friction

• Balanced force

• Vector quantity

• Sir Isaac Newton

Two or more forces that act on an object without causing a change in the object's motion.

• Balanced forces

• Unbalanced forces

• Static friction

• Kinetic friction

A labeled drawing that explains or shows the part of something; can be a type of model.

• Vector quantity

• Net force

• Diagram

• Friction

A type of friction that occurs when force is applied to an object and the object moves.

• Force

• Kinetic friction

• Static friction

• Net force

The sum of all forces acting on an object.

• Force

• Balanced forces

• Unbalanced forces

• Net force

Unit of force in the metric system.

• Kilogram (kg)

• Pounds (lb)

• Newton (N)

• Meters per second (m/s)

Two or more forces that produce a net force on an object. This causes the object to change speed or direction (accelerate).

• Unbalanced forces

• Balanced forces

• Net force

• Vector quantity

A type of friction that occurs when the force that is applied does not cause the object to move.

• Kinetic friction

• Static friction

• Heat friction

• Force

A measurement that expresses both magnitude (size) and direction.

• Force

• Newton (N)

• Diagram

• Vector quantity