Which of the following has no acceleration?

A. a satellite orbiting at a constant speed

B. a person running once around a track at a constant speed

C. a car making a turn at a constant speed

D. a person running 100 m straight across a field at a constant speed

Question

Which of the following has no acceleration?

A. a satellite orbiting at a constant speed 

B. a person running once around a track at a constant speed 

C. a car making a turn at a constant speed 

D. a person running 100 m straight across a field at a constant speed

aravindg · Answer

It is D because acceleration is rate of change of velocity ,here speed is constant so a=0