Question

describe about the various forms of v-t graph

Answer 1

These are some v- t graphs
I hope you will better understand with the help of these pictures.

Answer 2

Hi..

The principle is that the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object. If the acceleration is zero, then the slope is zero (i.e., a horizontal line). If the acceleration is positive, then the slope is positive (i.e., an upward sloping line).

For example....

Calculate the acceleration of the object in each interval of time.

Solution
Velocity in the first 5s,
a = dv/dt= 20- 0/5 - 0m/s2
a = 4 m/s2

Velocity in between 5s and 10s,
v = dx/dt = 20 - 20/10 - 5m/s2
v= 0 m/s2

Velocity in between 10s and 15s,
v = dx/dt= 0 - 20/15 - 10 m/s2
v= -4 m/s2..


Hope this helps u!!