acceleration and velocity time graphs Flashcards
what is acceleration
-how quickly the velocity is changing
what can change velocity
- change in speed
- change in direction
- both
what is the formula for acceleration
-acceleration=change in velocity -:- time taken
what is the formula triangle for acceleration
/(v-u)\\ //\_\_\_\_\\ //A xT \\
(V-U)
- what does the v mean
- what does the u mean
v=final velocity
u=intitial velocity
what does the (v-u ) bit mean in the acceleration formula
- change in velocity
what is acceleration unit
m/s2
question
- a car accelerates from 2m/s to 6m/s in 5.6s
answer
-use formula
-a=(v-u)/t = (6-2 ) /5.6
=4 -:- 5.6 = 0.71m/s2
true or false for velocity time graph
-flat section represent steady speed
true
-on a velocity time graph flat sections represent steady speed
true or false for velocity time graph
-the steeper the graph ,the worse acceleration or deceleration
false
-on a velocity time graph the steeper the graph the greater acceleration or deceleration
true or false for velocity time graph
-uphill / sections mean acceleration
true
-on a velocity time graph uphill sections means acceleration
true or false for velocity time graph
-downhill \ sections means deceleration
true
-on a velocity time graph downhill means deceleration
true or false for velocity time graph
- curve means change in acceleration
true
-on a velocity time graph curve means change in acceleration
what does the area under any section of the graph (or all of it) mean
means that
- its is equal to distance travelled in that time interval
how do you find out the velocity on a velocity time graph
by reading the value of the velocity axis