# Velocity to Acceleration#

The velocity of an object moving along the x-axis is given by $$v_x$$ = -$$ct^{-2}$$, where $$c$$ = 1.6 m/s and $$v_x$$ and $$t$$ are in metres per second and seconds respectively.

## Part 1#

What is the instantaneous acceleration of the object when $$t$$ = 4 s?

• 0.05 $$m/s^2$$

• -0.05 $$m/s^2$$

• -0.1 $$m/s^2$$

• 0.1 $$m/s^2$$

• The acceleration is 0 $$m/s^2$$