Answer:
Its acceleration is certainly negative.
Explanation:
- When an object moving in a straight line decelerates then its velocity certainly decreases.
- Its acceleration is certainly negative.
- As we know that acceleration is the rate of change in velocity and the object is decelerating i.e. its velocity is reducing with time.
[tex]a=\frac{v_f-v_i}{t_f-t_i}[/tex]
where:
[tex]v_f\ \&\ v_i[/tex] are final and initial velocities of the object
[tex]t_f\ \&\ t_i[/tex] are final and initial time of observation.
- Its SI unit is [tex]m.s^{{-2}[/tex]
