1st law
speed in a given direction
velocity
A push or pull
force
characteristic of a moving object related to the mass and velocity of the object
momentum
SI unit for force
Newton
what is the formula for momentum?
mass times velocity
Force that two surfaces exert on one another when they rub against each other
friction
tendency of an object to resist motion
inertia
combination of all forces acting on an object at one time
net force
centripetal force
acceleration
an object that is thrown
projectile
object with gas driven action force and uplifted reaction force
rocket
These two factors effect the friction force exerted on an object
these two factors affect gravity
mass and distance
What is the mass of an object accelerating at 3m/s2 and a mass of 3,000 N
1,000 kg
What force is exerted on an object that is not moving
balanced
What type of friction relates to an object with no motion?
static friction
this changes acceleration of an object and slows its acceleration towards Earth
air resistance
What types of friction relate to unbalanced forces?
sliding, rolling, and fluid
What is the momentum of a 920 kg car moving at a speed of 25 m/s?
23,000 kg * m/s
State Newton's first law of motion
An object at rest remains at rest, an object moving with constant velocity will continue moving at constant velocity unless acted upon by an unbalanced force
Acceleration depends on the object's mass and the net force acting on the object
State Newton's third law of motion
when one object exerts a force on another object, the second object exerts a force of equal strength in the opposite direction of the first object
What is the force of gravity equal to?
9.8 m/s2
What is the force on an object that has a mass of 800 kg and is accelerating at 5m/s2
4,000 N