1. A graph is plotted showing of a car as a function of time. If the graph is a straight line, it means that(a) the car started at rest (b) acceleration was constant(c) acceleration was increasing (d) velocity was constant
Answers
Answer:
(b)acceleration was constant
Explanation:
If the graph is a straight line, most may get the option (d) the answer as the velocity was constant since the acceleration is zero (The slope of a velocity - time graph gives acceleration).
But (d) is a wrong option as the graph is said to be 'just' a straight line but it's not said that the graph is parallel to time axis! Acceleration is zero only on this case. Many confuse on this.
If the velocity - time graph is a straight line it means the velocity of the bus gradually changes, increases or decreases, by the same rate after each unit time. This also means that the acceleration is a constant every time (the slope is constant for each point in the graph.)
Answer:
(d) velocity was constant
Explanation: