Question

The velocity-time graph of a particle moving in a straight line is shown in figure. The acceleration of the particle at $t=9$s is

• A. zero
• B. $5m/s^2$
• C. $-5m/s^2$
• D. $-2m/s^2$

Answer 1

The correct option is C $-5m/s^2$

We know,

Acceleration at a point is defined as slope of velocity-time at that point.

$att=9s$

Slope $=\frac{5-15}{10-8}=-5m/s^2$

Option $\text{C}$ is the correct answer