forces and motion Flashcards
(24 cards)
what is a force
a push or pull in a particular direction
what are the 2 forces
contact and non contact
give 3 ex of contact forces
pushing a block kicking a soccer ball writing with a pencil
what scientific laws
description of what occurs in nature
what are scientific theory
explanation for why or how something occurs in nature
3 ex of non contact forces
gravitational magnetic electrostatic
describe 3 things forces have the ability to do to an object
make an object move, stop a moving object, change the speed of a moving object
record the unit and equation for measuring force
newtons
f=mass(kg) x acceleration(mps2)
what is electrostatic force and how does it occur
the force that exists between electrically charged particles between 2 objects
what are magnetic forces and how do they occur
a force that attracts or repels magnetic objects
its a push or pull exerted by a magnet
what is gravitational force? where does gravity pull objects
the force by which an object attracts another object towards itself
when does motion occur
when an object changes its position relative to a reference point
discern between distance and displacement
how far an object has traveled
distance+direction of an objects change in position from starting point
give an ex of distance
walking to somebodies house
give ex of displacement
stoping half way to eat a sandwich
what is speed? how is it diff to velocity
distance an object travels per unit of time
v takes direction into account
what is acceleration
rate of change in velocity
what are the 3 types of speed
instantaneous, avg speed, constant
give ex of each type of speed
checking speedometer, taking road trip, cruise control
what is equation for speed
s(meters per sec)= d(meters)/t(secs)
what is equation for acceleration
vf-vs/t
whats momentum? definition
property of a moving object resulting from its mass + velocity
whats inertia
tendency of an object to resist any change in its motion
what are the 3 laws of motion? def and nickname
inertia- an object in motion stays in motion or an object at rest stays at rest until an unbalanced force acts upon it
acceleration- a net force acting on an object cause the object to accelerate in the same direction as the force
action and reaction- for every action or force there is an = opposite reaction or force
