Motion Graphs

Question 0

Speed equation

Answer 0

Speed = distance/time

Question 1

Acceleration equation

Answer 1

a = v - u /t 
Acceleration = (velocity - original speed) /time
m/s(sq) = (m/s - m/s) /s

Question 2

Speed time graphs

Answer 2

Gradient: acceleration
Steep gradient: large acceleration
Shallow gradient: small acceleration
No gradient: constant speed
Area under: distance travelled

Question 3

Distance time graphs

Answer 3

Gradient: the speed in which an object is going
Steep gradient: fast speed
Shallow gradient: slow speed
No gradient: no speed

Question 4

What is a Sankey diagram

Answer 4

Shows you how well a machine uses its energy. In other words, it tells you if it uses it efficiently or inefficiently. The thickness of the arrows shows how much energy is involved but the length is irrelevant. The wasted energy arrow faces down or up.