Balanced and Unbalanced Force

Which could be an example of an unbalanced force?

• A plate sitting on a dining table
• A ball at the top of a hill that is not moving
• Earth orbiting the Sun 
• A baseball that has been thrown to home plate.

Which could be an example of a balanced force?

• An asteroid moving at a constant speed through space 
• A car accelerating from a stop sign
• A box of dishes falling from a counter 
• A rocket taking off 

Which of the following objects will experience an unbalanced force?

• A bike rider on a smooth and level road, pedaling at a constant rate.

• A train pulling on another train, each with the same amount of force.

• A chair sitting on the floor with balanced forces acting in opposite directions.

• A ball rolling across the floor with friction acting in the opposite direction.

If these teams are pulling with the same amount of force what will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Balanced or unbalanced?

• balanced
• unbalanced

If an object is not moving the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!

The moon orbiting the Earth at a constant speed.

• Balanced Force

• Unbalanced Force

A lamp sitting on a table.

• Balanced Force

• Unbalanced Force

Are forces balanced or unbalanced when a marble rolls down a ramp?

• Balanced
• Unbalanced

What is a force?

• A push only

• A pull only

• A push and a pull

• A motion