Question

Fid 2.36 shows the displacement-time graph for four bodies A,B,C and D.In each case state what information do you get about the acceleration (zero, positive or negative).

Answer 1

For body A: The graph is a straight line. So, the slope gives constant velocity. Hence, the acceleration for body A is zero.
For body B: The graph is a straight line. So, the slope gives constant velocity. Hence, the acceleration for body B is also zero.
For body C: The slope of the graph is decreasing with time. Hence, the acceleration is negative.
For body D: The slope of the graph is increasing with time. Hence, the acceleration is positive.