Answer:
[tex]-1.5 m/s^{2}[/tex]
Explanation:
Acceleration is the rate of change in speed per unit time.
[tex]Acceleration=\frac {Final velocity-Initial velocity}{time taken}[/tex]
Given information
Initial velocity=7 m/s
Final velocity= 4 m/s
Time= 2 seconds
Substituting the above figures we obtain
[tex]Acceleration=\frac {4 m/s-7 m/s}{2 s}=-1.5 m/s^{2}[/tex]
Since it's negative, this is deceleration of [tex]1.5 m/s^{2}[/tex]
