Forces & Motion

This will change if an object goes to the moon

• weight
• mass
• volume
• height

Net force

• A single force that acts on an object
• The sum of all of the forces acting on an object
• The force in one direction minus a force in the same direction
• The force in one direction plus a force in the opposite direction

Mass

• moves an object
• is the amount of space an object takes up
• is the effect of gravity on an object
• is the amount of matter in an object

What is Newton's 3rd Law of Motion?

• For every force there is an equal and opposite force
• What goes up must come down
• Size and direction of the net force equals the mass times the acceleration
• An object at rest will remain at rest unless acted on by an unbalanced force

What is the force that slows down an object when in contact with the ground?

• Wind resistance
• Gravitational force
• Friction
• Totally the correct answer

What is an example of Newton's 1st Law of Motion?

• An ice skater pushes with more force and begins to move faster.
• A magician pulls out the tablecloth from under the dishes and they do not move.
• For every action and there is an equal and opposite reaction
• A fireman turns on a fire hose and is knocked backward

What is an example of Newton's 2nd Law of Motion?

• A soccer ball won't move until it's kicked.
• The air is let out of a balloon and it flies around the room
• A car slows down due to friction.
• It takes more force to move a bowling ball than a baseball.

What is an example of Newton's Third Law of Motion?

• A rocket blasting off.
• Several dogs pulling a sled rather than one dog pulling a sled
• Wood burning
• An object in motion will continue in motion until an unbalanced force acts on it

If air is let out of a balloon quickly, air pushes down and the balloon goes up.

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law
• Universal Law of Gravitation

A seatbelt stops you from hitting the windshield if you hit the brakes quickly

• Newton's 1st Law of Motion
• Newton's 2nd Law of Motion
• Newton's 3rd Law of Motion
• Friction