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

isaiah.feynman · Answer

D.

danjs · Answer

acceleration is a change in velocity, Velocity is a vector quantity..so the change can be in  either the magnitude or the direction or both.