Answer
D. 0.25 meters/second2
Explanation
The average acceleration is the ratio of change in velocity to the change in time of travel.Taking in this case that the change of velocity is a unit, then Average acceleration is given by;
Aacc=Vf-Vi/Tf-Ti
where Vf=final velocity,Vi=initial velocity' Tf=final time, Ti=initial time
Vf-Vi=1m/s
Tf-Ti=4-0=4seconds
Avacc=1/4=0.25m/s2
Answer:
Option C
Explanation:
Acceleration is defined as rhe rate of change of velocity per unit time. Therefore
Here, v is velocity and t is time. Sunscripts f and i represent final and initial respectively
Acceleration between 0 and 2 s
Time is 2 seconds
Intial velocity is 0 m/s
Final velocity is 2 m/s
Change in velocity is 2-0=2 m/s
Acceleration=2/2=1 m/s2
Acceleration between 2 and 4 seconds
Time is 4-2=2 seconds
Initial velocity is 2 m/s
Final velocity is 0.25 m/s
Change in velocity is 0.25-2=-1.75 m/s
Acceleration is -1.75/2=-0.875 m/2
Average acceleration will be (1+-0.875)/2=0.0625 m/s2
Rounded kff will bw 0.06 m/s2