00:01
Hello, we have to solve the following problem.
00:03
Velocity of the particle can be described as following function.
00:12
And here time varies from 0 to 5 seconds.
00:16
First, in question a, we have to sketch the graph.
00:32
The initial velocity at 0 is 6 meters per second, and the velocity at 5 seconds is negative 4 meters per second.
01:08
Now, from this graph, we will calculate acceleration, and acceleration is a slope, which is negative 2 meters per square second.
01:23
Now we have to find acceleration at, actually in question b, we have to calculate average velocity from 2 to 4 seconds.
01:44
Let's do this.
01:46
So here first let's calculate the value of velocity at two seconds.
01:52
At two seconds, that is two meters per second...