Question

Page : 2.8

Answer 63 with Explanation.

Answer 1

Hey friend, Harish here.

Here is your answer:

The answer is option be because,

The time cannot repeat itself again. We know that, Time once completed never comes again.

And it doesn't even represents any motion.

→ a) This diagram represents a object which once uniformly accelerated and then retarded uniformly.

→ c) The represents the rest motion of an object which is also an one dimensional motion.

→ d) This represents the nonuniform motion in single dimension.

Hence option B is proved to be wrong. So it is the correct answer.
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Hope my answer is helpful to you. 

Answer 2

Hey mate !!!

Here is V -T graph .

and the slope V-T graph gives acceleration !!!

in case 1:-

first there is ACCELERATION and after that there is retardantion .❎❎



Case :- 3

There is nothing Object doesn't started. .

so there is no any curves .❎❎




Case 4 :- there is ACCELERATION and retardantion continuously .

this also goes ❎❎


Case 2 :-

there is no slope , and there is no information about acceleration and retardantion . beacuse it is in cirlcular

so we can't say either the object goes for acceleration or RETARDATION .


✅✅ there is no curve of case 2 .


so it doesn't provide full information !!! ✅✅



hence , case 2 can't REPRESENT in one dieminsion .




hence Option number B is correct !


hope it helps you!!

thanks