Question

A vehicle is accelerating on a straight road, its
any point is 30 km/h, after 2
sec, it is 33.6 km/h and after further 2 sec
it is 37.2km/h. Find acceleration in m/s. Is
the acceleration uniform?​

Answer 1

Answer:

Given velocity v1=30km/h=8.33m/s

velocity v2=33.6km/h=9.33m/s

velocity v3=37.2km/h=10.33m/s

Time interval between v1 and v2= 2s and v2 and v3 =2 s

Now acceleration a12=29.33−8.33=0.5m/s2 

similarly acceleration a123=210.33−9.33=0.5m/s2

Now the net acceleration a12=410.33−8.33=0.5m/s2  

Yes the acceleration is uniform

Answer 2

Answer:

the acceleration is uniform

Explanation:

Acceleration = Change in velocity/time taken

In the first two seconds,

Acceleration = [(33.6 - 30)/2] km/h2

               = 1.8 km/h2

               = 0.5 m/s2 …(i)

In the next two seconds,

Acceleration = [(37.2 - 33.6)/2] km/h2

               = 1.8 km/h2

               = 0.5 m/s2…(ii)

From (i) and (ii), we can say that the acceleration is uniform.