P2 - Speed, Velocity & Acceleration
Terms in this set (11)
What is the difference between a scalar and a vector?
A scalar is just a number. A vector also has direction
What is the difference between distance and displacement?
Both terms say how far something has travelled, but displacement also says in which direction.
Which TWO of the following are vectors?
Velocity & Displacement
What equation do you use to calculate distance travelled?
Distance Travelled = speed x time
How do you calculate the speed of an object?
Speed = Distance/Time
What is acceleration?
It is the rate of change of velocity
A change in velocity can be a change in speed OR ..........
A change in direction
How do you calculate acceleration?
Acceleration = Change in velocity/time
How do you calculate change in velocity?
final velocity - initial velocity
If an object showed negative acceleration, what would this mean?
It is slowing down
What is the following equation used for?
V squared - U squared = 2as
For calculating distance or velocity at CONSTANT ACCELERATION