Given: A car is moving wilh uniform velocity A We know that speed is the magnitude of velocity. Hence, uniform velocity implies uniform speed. Thus, speed of the car remains constant. Option 'A' is incorrect. B. Again, as the car moves with uniform velocity, there exists a uniform speed which will be non-zero. Option 'B' is incorrect C. Acceleration of the car is given by
→
a
=
d
→
v
dt
Given :
→
v
= constant ⇒
d
→
v
dt
= 0 =
→
a
Hence,
→
a
0. Option 'C' is incorrect while option 'D' is correct. Therefore, only option 'D' is correct.