speed/velocity/momentum Flashcards
Motion
A change in position in a certain amount of time.
Reference point
A place or object used for comparison to determine if something is in motion.
Speed
The rate at which an object moves.
Average speed
When speed changes. Total distance/Total time The rate at which an object is moving at a given moment in time.
Constant speed
Speed that does not change.
What is the difference between displacement and distance?
The complete length of the path between any two points is called distance. Displacement is the direct length between any two points when measured along the minimum path between them.
Slope
Add together.
Deceleration
A decrease in acceleration./To slow down.
Velocity
The steepness of a line on a line graph. The steeper the line the faster the speed.
Acceleration
The rate of change in velocity./It tells how fast something is happening./How fast velocity is changing./It is always a curved line on a graph.
Momentum
Determines how difficult it is to stop an object’s motion./The greater the momentum the more stopping distance needed./The larger the mass or velocity the greater the momentum.
The law of conservation of momentum
The total momentum of any group of objects remains the same unless outside forces act on the object./It can be passed from one object to another.
What are the three ways that motion can be considered acceleration?
Acceleration
Deceleration
Circular acceleration
What are the SI units used for the following:
Distance - meters, kilometers, miles
Speed - m/s
Velocity - m/s
Acceleration - m/s/s
momentum - kg-m/s
Know the formula and how to apply it for the following terms:
Speed - s=d/t
Acceleration - (Fv-Ov)/T
Momentum - p=m*v
