Question

(HUT)
04Given below are some speed time graphs.
in which of the graph-
(a)Speed is constant (b)Speed is increasing
in(iv&v)
(c)speed is decreasing
(d) What happens
KAED
Time -
Time -​

Answer 1

Answer:

iii, i and ii. And for explanation of all the options, see explanation below:

Explanation:

(a) Speed is constant in (iii) because the graph is perpendicular to speed axis, meaning that speed at every point is same.

(b) Speed is increasing in (i) because as you can see, the graph is going upwards.

(c) Speed is decreasing in (ii) because as you can see, the graph is going downwards.

(d) In (iv.) it is shown that the body started from rest, acquired a certain Velocity (speed), keeps it uniform for sometime i.e. moves with the same speed for sometime, and then retards (slows down and its speed gradually drops to zero).

In (v), it is shown that, the speed is inversely proportional to time, meaning that as the time inceases, the speed decreases, but in an exponential manner, which means that the graph won't be a straight line.

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Answer 2

Answer:

(a) speed is constant in (iii).

(b) speed is increasing in (i).

(c) speed is decreasing in (ii).

(d) in (iv) it is shown that the body started from rest acquired a certain velocity (speed).

In (v) it is shown that the speed is inversely proportional to time.