Balanced and Unbalanced Forces

What happens when two equal forces act on an object in opposite directions?

• The object spins

• The object is at equilibrium

• The object accelerates

• The object moves in one direction

What is an example of a balanced force?

• A car speeding up

• A book resting on a table

• A ball rolling down a hill

• A person pushing a wall

What force acts downward on a book resting on a table?

• Friction from the table

• Air resistance

• Earth's gravitational pull

• The table's push

What does it mean when forces are balanced?

• The object will move

• The object will fall

• The object will not accelerate

• The object will spin

What is an unbalanced force?

• A force that does not change motion

• A force that changes position, speed, or direction

• A force that acts in one direction only

• A force that is equal in magnitude

What happens when a book is slid from right to left across a table?

• The forces are balanced

• The book spins

• The book remains at rest

• The forces are unbalanced

What is true about the upward and downward forces on the book when it is slid?

• They cause the book to move

• They are unbalanced

• They are not acting on the book

• They are equal in magnitude

What does it mean if the magnitudes of the forces are not equal?

• The forces are balanced

• The forces are unbalanced

• The object is at rest

• The object will not move

In the 'Try This!' activity, what do both partners do?

• Pull equally

• Jump together

• Push equally

• Stand still

What is the result of unbalanced forces acting on an object?

• The object stays still

• The object changes speed or direction

• The object becomes heavier

• The object loses energy