science tet 1
Terms
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- rolling friction
- friction btwn rolling obj. and the surface it is rolling on
- newton's 2nd law formula
- a = net force (Newtons) over mass (kg)
- momentum
- the property that a moving obj. has because of its mass and velocity
- friction
- the force that opposes motion btwn two surfaces that are touching each other and moving in opp. directions
- 3 factors of funding air ressitance
- shape, speed, size
- terminal velocity
- forces an a falling obj. are balanced and the obj. fall with a constant speed
- air resistance
- the force air exerts on a moving obj.
- horizontal motion
- the motion that is inertia to earth's surface and is due to inertia
- weight
- gravitational force exerted in an object
- centripetal acceleration
- acceleratin toward the center of a curve or circle
- static friction
- friction btwn surfaces that are not moving past each other
- gravity depends on
- mass of objects and the distance between them
- law of conservation of momentum
- total amount of momentum does not change unless outside forces act on it
- microweld
- areas where the surface bumps stick together and are a source of friction
- why does anything thrown follow a curved path ?
- gravity and its own inertia
- the larger the surface the greater the
- air resistance
- what kind of force in gravity
- long-range
- mass
- the amount of mass an object has
- vertical motion
- the motion that is perpendicular to earth's surface is from gravitational pull
- acceleration due to gravity is
- 9.8 m/s2
- sliding friction
- force that opposes the motion of two surfaces that are sliding past each other
- electromatic force
- causes electricity and magnetism
- what does nuclear force only act on
- particles in the nuclei of atoms
- centripetal force
- the force that causes a moving object to move in a circular path
- what kind of force is centripetal force
- unbalanced
- a force that works in pairs
- action reaction
- momentum formula
- p = m times v
- changing momentum formula
- f = MVf - MVi over t
- newton's 3rd law
- for every action there is an equal and opposite reaction
- formula for gravitational force
- F = G m2m2 over d2
- law of universal gravitation
- allows the force gravity to be calculated btwn any 2 obj's if there masses and the distance btwn them are known