4. Describing Motion Flashcards
Scalar quantities
Are measurements that include numbers and units but do not include a direction. Some examples may be mass, distance, speed, volume.
Vector quantities
Are measurements that include number and units and do include a direction. Some examples include Displacement, Velocity, Acceleration, Force, etc.
Difference between Distance and Displacement.
Distance path is independent. Displacement is a vector and must be a straight line path from A to B.
Displacement’s symbol
Δx or Δy
Displacement is simply…
a change in position; Δx = a change
How to calculate displacement?
Similarities of Speed and Velocity
Both measure a change in an object’s position or its displacement over time.
Speed
is a scalar quantity which means it has a magnitude but no direction.
eg., 55m/s
Velocity
is a vector quantity which has both a magnitude and direction. It is essentially speed with a direction.
e.g.,
55 m/s North
How to calculate the average value of a velocity
Acceleration
is simply a change in an object’s velocity overtime.
What is the equation for acceleration?
How do you graph an object sitting still at x=2
How do you grapn an object moving at a constant speed of 1m/s starting at x=0 and travelling for 5 seconds
Understand what’s on the other side of this card.
Understand what is happening on the other side of the graph.
