Question

Refer to distance $\left(x\right)-$ time $\left(t\right)$ graph. Which of the following is incorrect?

• A. At D, velocity is positive.
• B. At F, motion is in the -x direction.
• C. At C, velocity is +ve
• D. All of these

Answer 1

The correct option is A At D, velocity is positive.

We know that the slope of the $x-t$ graph represents velocity and the slope of tangent at $D$ is zero so velocity at point $D$ is $0$.
At point $C$, slope is positive due to which velocity is also positive.
At point $F$, slope is negative due to which velocity is also negative which means that the direction of motion is now in -x direction.