Balanced forces result in no net force and no change in motion
Inertia is a fundamental property of matter
The sum of all forces acting on an object with balanced forces is zero
Give an example of balanced forces acting on an object at rest.
Two equal and opposite forces
A book resting on a table remains at rest because its weight is balanced by the normal force from the table.
A spacecraft drifting in outer space moves at a constant velocity because no external forces act on it.
True
What is the effect of an external force on an object's motion?
Changes in motion
Inertia is the tendency of an object to resist changes in its state of motion.
Inertia is a key concept in Newton's First Law of Motion.
True
Newton's First Law is also known as the Law of Inertia.
Under what conditions does an object in motion continue moving at a constant speed in a straight line?
No unbalanced force
Balanced forces result in no net force and no change in motion.
True
Give an example of balanced forces in real life.
A book resting on a table
Match the scenario with its description according to Newton's First Law:
Balanced Forces ↔️ No net force, no acceleration
Unbalanced Forces ↔️ Net force, acceleration
A book on a table remains stationary due to balanced forces.
True
Inertia is the tendency of an object to resist changes in its state of motion
Newton's First Law is also known as the Law of Inertia
The sum of all forces acting on an object with balanced forces is zero
Newton's First Law highlights the concept of inertia.
True
Match the type of force with its effect:
Balanced Forces ↔️ No net force, no change in motion
Unbalanced Forces ↔️ Net force, change in motion
An object's state of motion remains unchanged due to balanced forces.
True
Why does a car moving at a constant speed on a straight highway maintain its velocity?
Balanced forces
Match the term with its definition:
External Force ↔️ Forces from external sources that change motion
Net Force ↔️ Vector sum of all external forces
The net force determines an object's resulting motion according to Newton's Second Law.
True
What property of an object causes its inertia?
Mass
State Newton's First Law of Motion.
Law of Inertia
An object at rest remains at rest unless acted upon by an unbalanced force.
True
What determines an object's inertia?
Mass
The sum of all forces in balanced forces is zero.
What is the combined effect of all external forces called?
Net Force
A car cruising at a constant speed maintains its velocity due to balanced forces between the engine force and opposing forces like friction and air resistance.