Definitions
A pull or push on an object
Force
Forces equal in size, but opposite directions
balanced
Law that states an object in motion stays in motion unless a new force acts on it
Newton's First law
Unit of measure for force
Newton
Acceleration due to gravity on Earth
9.8 N/kg
the tendency of an object to resist a change in motion
inertia
The amount of gravitational force between objects depends on this
Mass and distance between them
Law that states for every action, there is an equal and opposite reaction
Newton's 3rd Law
Friction between a soccer ball and grass
Rolling
The maximum speed an object will reach when falling through a substance such as air depends on the objects _____
Size, shape, and mass
Attractive force that every object in the universe exerts on every other object
Gravity
If a soccer ball is kicked 75N towards the right and 125 N towards the left, what will the direction of the net force be?
to the left
Law represented by F=ma
Newton's 2nd Law
the more ______, the more inertia
mass
A flat piece of paper will fall to the ground more slowly than a tightly crumpled paper because of an upward force exerted through the air known as
Air Resistance
The force that opposes the sliding motion of two surfaces that are in contact
friction
The moon's gravity is 1.62 N/kg. How much would a suitcase weigh, which has a mass of 10kg, on the moon?
16.2N
Newton's 1st law is also known as this
Law of inertia
bumps on a surface that cause friction
microwelds
An object in free fall seems to be
Weightless
A force exerted toward the center of a curved path
centripetal force
How much would a suitcase weigh, which has a mass of 10kg, on Earth?
98N
Law of motion that best describes a rocket propelling upward from the force of gas downward
Newton's 3rd Law (Equal and opposite reaction)
Why does the moon have less gravity than Earth
Less gravitational force
when two pool balls collide, the momentum of the balls after the collision is explained by what
Law of Conservation of Momentum