Unit resources Flashcards
Displacement is similar to distance but
is a vector quantity that has a size (distance) and a direction
All masses
attract each other
An electromagnetic force between surfaces
normal force (N, R or Fn)
the force of friction is
an electromagnetic interaction between charges in surfaces
Friction is
The push and pull of charges on surfaces as they slide past each other
Vectors in opposite directions
Cancel out
The momentum of an object depends on its
mass and velocity
The momentum gained by one thing….
Is equal to the momentum lost by another
When two things act on each other
Their total momentum remains constant, providing there is no external force
If there is a force on an object
it accelerates (F = ma = m change in v / change in t)
Impulse =
Force on the object x time
Impulse is….
Product of the force being multiplied by the time which the force is being applied
Impulse does not affect
Change in momentum
Momentum of an object depends on
direction of travel
Momentum can change if….
An object speeds up, slows down, or changes direction
