forces and motion. Flashcards
how are forces acting on an object when stationary are?
equal and opposite.
in equilibrium.
balanced.
what sort of diagram do you use if your asked to label a diagram for these types of questions?
free body diagram which is off the object in the space surrounding it- don’t draw the arrows on the object.
what is newtons 1st law?
objects continue to move with a constant speed and direction (constant velocity) unless acted upon by a resultant force (non-zero.)
if 500N is to the left and there is 450N to the right what is the size and direction of the resultant force?
50 N to the left.
how can distance be described?
how far an object moves.
scalar quantity ( it only has size.)
how can displacement be described?
measures how far we have travelled in a given direction.
vector quantity (it has both direction and size.)
what are the average speeds for: walking.
running.
cycling.
1.5m/s.
3m/s.
6m/s.
how can speed be described?
how fast an object moves.
doesn’t involve direction (scalar quantity.)
how can velocity be described?
how fast an object moves in a given direction?
vector quantity.
formula involved =?
velocity= displacement/ time.
V= S/T.
