Question

1) Assertion : In a uniformly accelerated motion acceleration time graph is straight line
Reason : Assertion is rate of change of velocity
(a) Both Assertion and Reason are true and the Reason is the correct explanation of the assertion
(b) Both Assertion and Reason are true but reason is not the correct explanation of the Assertion
(c) Assertion is true but Reason is false
(d) Assertion and Reason both are false

2) When does a train have negative acceleration?

If you answer these 2 questions I will mark you as brainliest ​

Answer 1

Answer:

(i) Option D

(ii) When it applies brakes

Answer 2

Answer:

Answer might be (d) for the first question

Answer for second question- When the speed of train is retarding means the forces by engine are stopped and only frictional force is acting on it (in most scenarios).

Moreover when the train applies brakes, then also it is having a negative acceleration.