Question

The displacement versus time graph of a moving body is given below. Which one of the following graphs represents the velocity versus time graph of the moving body?

Answer 1

1. As we know, In a displacement-time graph, whenever there is a constant slope, it indicates that the change in displacement of the body is zero, i.e. the velocity of the body is zero.
2. 
   
3. Also, whenever there is a constant decrease in the slope, it indicates that the velocity of the body is constant, and is negative. On the other hand, if there is a constant increase in the slope of displacement-time graph, the velocity is also constant, but is positive. So, the correct velocity-time graph looks like this:
4.