Nature of Force
A push or pull
What is a force?
friction
What is the force that 2 surfaces exert on each other when they rub against each other?
resistance to change in motion
What is inertia?
Mass x velocity
What is momentum?
Friction always acts _________ the direction of motion
What is opposite?
newton
What is force measured in?
types of surfaces & how hard the surfaces are pushed together
What are 2 factors that affect the force of friction?
net force = mass x acceleration
What is Newton's 2nd law of motion?
The momentum of an object is in the same _______ as its _________.
What is direction, velocity?
Law of Inertia
What is Newton's 1st law of motion?
strength and direction
How is force described?
4 types of friction
What are sliding, static, fluid, & rolling?
For every action there is an equal but opposite reaction
What is Newton's 3rd law of motion?
In the absence of forces like friction, the total momentum of objects that interact does not change.
What is the law of conservation of momentum?
you don't want a lot of this on you if you are hiking up a steep mountain
What is mass?
net force
What is the combination of all the forces on an object?
gravity
What is the force that pulls objects toward each other?
Acceleration measurement
What is meters per second (m/s2)?
A car that is going _______ before a collision will end up ______ ________.
What is faster, slowing down?
directly proportional to force and inversely proportional to mass
What is acceleration?
nonzero net force
What causes a change in objects motion?
2 factors that affect the gravitational attraction between objects
What is mass and distance?
In addition to his 3 laws of motion, Newton also developed this law
What is the law of universal gravitation?
momentum stays the same when collision occurs between 2 colliding objects
What is shared momentum?
The net force on an object is equal to the product of its mass and acceleration
What is the 2nd law of motion?