forces 2

Cards (19)

what is a vector quantity
one that has direction and magnitude
what is newtons first law
an object will stay in a state of rest in a straight line unless acted upon by an external force
name the contact forces
upthrust
friction
air resistance
what is inertia
the tendency of an object to continue moving once moving
what is newtons second law of motion
force = mass x acceleration
what is newtons third law
for every action force there is an equal but opposite reaction force
what are the 2 equations for acceleration
difference/time
force/mass
what is the resultant force on an object
the overall net force
name the non-contact forces
magnetic
electrostatic
gravity
name an example of centripetal force
gravity
tension
friction
whats the equation for inertial mass
force/acceleration
what happens to the object if the resultant force is zero
it will travel at a constant velocity
whats the definition of conservation of momentum
the total momentum before a collision or explosion will equal the total momentum after provided that there are no external forces acting
whats the equation for momentum
mass x volume
whats the defintion of momentum
how hard it is to stop an object once it is moving
what is an elastic collision
when kinetic energy before equals kinetic energy after
whats the equation for conservation of momentum
totalPbefore = totalPafter
when there is a resultant force forwards the car accelerates
because the objects direction is constantly changing this means its velocity is constantly changing