Question

Speed time graph of a bus is shown below..
in which period is the bus accelerating
in which period is the bus decelerating
what is the distance covered during it's acceleration
what is the average speed during the entire journey...​

Answer 1

Answer:

this is the right answer bro

Answer 2

Answer:

the bus accelerates from 0 to 20 minutes, decelerates from 20 to 30 minutes, distance during acceleration is 6.67 km and the average speed is 20 km / hr.

Step-by-step explanation:

We are given the speed time graph of the bus.

First we need to tell in which period the bus is accelerating.

From the graph, we can see that the bus accelerates from 0 to 20 minutes.

Second, we need to tell in which period the bus is decelerating.

From the graph, we can see that the bus decelerates from 20 to 30 minutes.

Third, we need the distance during acceleration:

the distance covered during acceleration will be the area of triangle during the period 0 to 20 minutes.

Area =1 / 2 × 40 × 20 / 60

=20 / 3

= 6.67 km

And last we need the average speed:

Average speed = total distance covered / total time taken

Average speed =10 × 60 / 30

=20 km /  hr.

Therefore, the bus accelerates from 0 to 20 minutes, decelerates from 20 to 30 minutes, distance during acceleration is 6.67 km and the average speed is 20 km / hr.

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