Term
How do you find the distance or displacement from a velocity/time graph? 

Definition
Find the area under the graph.
Remember: s = area under graph 


Term
How do you find the acceleration from a velocity time graph? 

Definition
Find the gradient of the graph.
Remember: a = vu
t 


Term
[image]
Describe the motion from :
1. AB
2. BC
3. CD
4. DE
5. EF
6. FG


Definition
[image]
1. AB... constant acceleration
2. BC... constant speed
3. CD... constant negative acceleration/deceleration
4. DE... The car has stopped
5. EF... constant acceleration in the opposite direction
6. FG... constant speed in the opposite direction



Term
[image]
Find the acceleration for motion A 

Definition
[image]
acceleration = gradient of graph
a = vu
t
= 200
10
= 2 m.s^{2}
Remember u = 0 (starting speed)
and v =20 (final speed) 


Term
[image]
Find the acceleration for point C of the journey 

Definition
[image]
acceleration = gradient of graph
a = vu
t
= 020
40
= 0.5 m.s^{2} (negative acc./deceleration)
Remember u = 20 (starting speed)
and v =0 (final speed) 


Term
[image]
Find the distance travelled



Definition
[image]
distance = area under graph
Area for part A = 1/2 x 10 x 20 = 100m
Area for part B = 20 x 20 = 400m
Area for part C = 1/2 x 40 x 20 = 400m
distance travelled = 900m




Term

Definition


Term

Definition

