acceleration and velocity time graphs

Question 1

what is acceleration

Answer 1

-how quickly the velocity is changing

Question 2

what can change velocity

Answer 2

• change in speed
• change in direction
• both

Question 3

what is the formula for acceleration

Answer 3

-acceleration=change in velocity -:- time taken

Question 4

what is the formula triangle for acceleration

Answer 4

/(v-u)\\    
//\_\_\_\_\\
//A xT  \\

Question 5

(V-U)

• what does the v mean
• what does the u mean

Answer 5

v=final velocity

u=intitial velocity

Question 6

what does the (v-u ) bit mean in the acceleration formula

Answer 6

• change in velocity

Question 7

what is acceleration unit

Answer 7

m/s2

Question 8

question

- a car accelerates from 2m/s to 6m/s in 5.6s

Answer 8

answer
-use formula
-a=(v-u)/t = (6-2 ) /5.6
=4 -:- 5.6 = 0.71m/s2

Question 9

true or false for velocity time graph

-flat section represent steady speed

Answer 9

true

-on a velocity time graph flat sections represent steady speed

Question 10

true or false for velocity time graph

-the steeper the graph ,the worse acceleration or deceleration

Answer 10

false

-on a velocity time graph the steeper the graph the greater acceleration or deceleration

Question 11

true or false for velocity time graph

-uphill / sections mean acceleration

Answer 11

true

-on a velocity time graph uphill sections means acceleration

Question 12

true or false for velocity time graph

-downhill \ sections means deceleration

Answer 12

true

-on a velocity time graph downhill means deceleration

Question 13

true or false for velocity time graph

- curve means change in acceleration

Answer 13

true

-on a velocity time graph curve means change in acceleration

Question 14

what does the area under any section of the graph (or all of it) mean

Answer 14

means that

- its is equal to distance travelled in that time interval

Question 15

how do you find out the velocity on a velocity time graph

Answer 15

by reading the value of the velocity axis

Question 16

how do you work the distance travelled by in any time interval

Answer 16

by looking whats shaded in area