Motion Flashcards
What is the conversion for km h^-1 to m s^-1?
km h^-1/ 3.6 = m s^-1
m s^-1 x 3.6 = km h^-1
What is Newtons First Law?
A body in motion will remain in unchanged motion and a body at rest will remain at rest, unless acted upon by an external unbalanced force.
What is Newton’s Second Law?
All forces occur in pairs. Each member of a force pair is equal in magnitude, opposite in direction and acts on different objects.
What is Newton’s Third Law?
For every action there is an equal and opposite reaction force.
What are action-reaction pairs?
a pair of forces are action/reaction pairs if they are equal and opposite AND do not act on the same object.
What is tension?
Materials which have been stretched, such as ropes or rubber, exert a force called tension. For ropes, tension is always towards the center of the rope.
What is the rule for collisions?
in any collision, the force on both objects is equal, and so the duration of time for which that force as applied.
Law of Conservation of Momentum?
If the sum of external forces acting upon a system is zero, total momentum cannot change.
Does upward Force do work?
NO. UPWARD FORCE DOES NO WORK!
what is the difference between scalars and vectors?
vectors describe magnitude and direction (eg. velocity = how fast and what direction)
scalars describe magnitude only (eg. speed = how fast)
Define acceleration
The rate of change of an objects velocity
Define displacement
vector quantity representing the location of the destination relative to the origin of motion.
Define distance
total length of the pathway taken between the origin and the destination point.
