Question

Use the graph above to determine the change in speed of the object between 20 and 30 seconds?

Answer 1

Step-by-step explanation:

The attached figure shows the acceleration time graph of an object. We known that the slope of the a-t graph gives the velocity of an object. The area under the a-t graph gives the velocity of object.

In x axis, time t = 30 s- 20 s = 10 s

In y axis, acceleration,
`a = 6 - 0=6\ m/s^2`

Area under the graph from 20 to 30 seconds is given by :

`A=v=(1)/(2)* 10* 6`

v = 30 m/s

So, the change in speed of the object is 30 m/s. Hence, this is the required solution.