Question

fig 2.E5 shows speed time graphs for four cases. in which case is the speed constant? in which case is the speed decreasing? in which case is the speed increasing? what happens in the fourth case?​

Answer 1

In third case the speed is constant

In first case the speed is decreasing

In second case the speed is increasing

In fourth case the speed first increases, then speed remains constant and then finally the speed decreases

Explanation:

• If the speed does not change as time increases then in that case the speed will be constant

• From the four graphs given it is clear from observation that in the third graph as we increase the time on the x-axis, the speed does not change

• Therefore, in graph (iii) speed is constant

• If we see in the graph (i) as we move along the time axis the speed decreases

• In graph (ii) as we move along the time axis, the velocity is increasing

• In graph (iv) for sometime, the speed is increasing, then speed is constant and finally the speed is decreasing

Hope this answer is helpful.

Know More:

Q: Study the speed time graph of a body given here and answer the following questions:

a) what type of motion is represented by OA?

b) what type of motion is represented by AB?

c)what type of motion is represented by BC?

d) find the acceleration of the body.

e) calculate the retardation of the body.

f) find out the distance travelled by the body from A and B.

Click Here: https://brainly.in/question/3990914

Answer 2

1st Case

speed is decreasing.