The displacement–time graph of a moving particle is shown. The instantaneous velocity of the particle is negative at the point:

Question

G1 Physics · Accepted Answer

Step 1: Instantaneous velocity is the slope of the displacement–time curve. Step 2: At C and F the slope is positive; at D the slope is zero. Step 3: At E the curve slopes downward with time, so the slope and therefore the velocity are negative. Final answer: D.