The velocity (v)–time (t) plot of the motion of a body is shown. The acceleration (a)–time (t) graph that best suits this motion is:

Question

G1 Physics · Accepted Answer

Step 1: Acceleration is the slope of the v–t graph. Step 2: During the first straight rising part, slope is positive and constant, so acceleration is a positive constant. Step 3: During the horizontal part, slope is zero, so acceleration is zero. Step 4: During the final straight falling part, slope is negative and constant, so acceleration is a negative constant. Therefore the matching a–t graph is Image 2. Final answer: B.