Here, a body is moving with velociy v=u+5t and u is fixed- 5 ms−1.
So, putting the value of u in the velocity equation, we get
v=5+5t.
Now, the velocity at time t = 0:
v=5+5×0=5+0 = 5 ms−1
Now, the velocity at time t = 1:
v=5+5×1=5+5 = 10 ms−1
Now, the velocity at time t = 2:
v=5+5×2=5+10 = 15 ms−1
Now, the velocity at time t = 3:
v=5+5×3=5+15 = 20 ms−1