Question

From the displacement-time graph shown here, find the velocity of the body as it moves from $CtoD$.

• A. $2m{s}^{-1}$
• B. $3m{s}^{-1}$
• C. $4m{s}^{-1}$
• D. $5m{s}^{-1}$

Answer 1

The correct option is C $4m{s}^{-1}$

Answer is C.
The gradient of a displacement-time graph is velocity.
In the graph given, the time taken for the moving from point $C$ to $D$ is $1$ second and the displacement is read as $4m$.
Velocity is defined as the rate at which an object changes its position.
Hence, in one second, the distance covered is $4m$. So the velocity is $4m/s$.