Question

Assertion : position-time graph of a body moving uniformly in a straight line parallel to position axis. Says body is at rest.

Reason : The slope of position-time graph in a uniform motion gives the velocity of an object.

(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion. 

(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion 

(c) Assertion is correct, reason is incorrect 

(d) Assertion is incorrect, reason is correct.

Answer 1

Correct option (c) Assertion is correct, reason is incorrect   

Explanation:

If the position-time graph of a body moving uniformly in a straight line parallel to position axis, it means that the position of body is changing at constant time. The statement is abrupt and shows that the velocity of body is infinite.