Physics flash cards

system

the collection of objects that are of interest

closed system

a system in which masses do not enter or leave.

Isolated system

a system in which no net external forces act on the object within it.

momentum

the quantity of momentum. momentum is the product of mass and velocity, and because velocity is a vector, mass is also a vector

=elapsed time- the definition of acceleration/change in time

the change in momentum

Fnet

the net external forcer

Gravitational force (Fg)

Attractive force between two objects with mass.

Gravitational field(g)

a model explaining the influence object extends to produce a force on other objects.

Fg=G m1/m2 r^2

fg is gravitational force, G is the gravitational constant, m1 and m2 are point masses, r is the distance.

g=Fg/m2=Gm1/r2

g is the gravitational field strength

Resistance forces that can cause an

object to stop.= friction, air resistance, gravitation.

friction, air resistance, gravitation

D=r/t is the scalar version of?

v= s/t

Formula for 1 newton of force.

1N=1kgxm/s2

Double the mass=

half the acceleration.

Double the force only=

Double the acceleration

Double the acceleration=

double the force