Understanding Forces and Motion

What is force?

• The amount of matter an object contains

• An invisible force that pulls two objects towards each other

• Makes things speed up, slow down, or change directions

• The resistance of motion when one object rubs against another

What happens when an object is in motion?

• It stays in one place

• It moves from one place to another

• It becomes heavier

• It becomes lighter

What is mass?

• The resistance of motion when one object rubs against another

• An invisible force that pulls two objects towards each other

• The amount of matter an object contains

• The speed of an object

What is gravity?

• The resistance of motion when one object rubs against another

• An invisible force that pulls two objects towards each other

• The amount of matter an object contains

• The speed of an object

What is friction?

• The resistance of motion when one object rubs against another

• An invisible force that pulls two objects towards each other

• The amount of matter an object contains

• The speed of an object

What is a balanced force?

• Occurs when different amounts of force are applied to an object causing a movement

• Occurs when the same amount of force is applied to both sides of an object so that the object does not move

• The resistance of motion when one object rubs against another

• An invisible force that pulls two objects towards each other

What is an unbalanced force?

• Occurs when different amounts of force are applied to an object causing a movement

• Occurs when the same amount of force is applied to both sides of an object so that the object does not move

• The resistance of motion when one object rubs against another

• An invisible force that pulls two objects towards each other

Which of the following is true about mass?

• It is the resistance of motion when one object rubs against another

• It is an invisible force that pulls two objects towards each other

• The more matter it has, the more it weighs

• It makes things speed up, slow down, or change directions

Which of the following is an example of motion?

• A book sitting on a table

• A car driving down the street

• A rock on the ground

• A picture hanging on the wall

Which of the following best describes friction?

• An invisible force that pulls two objects towards each other

• The resistance of motion when one object rubs against another

• The amount of matter an object contains

• The speed of an object