An object traveling a circular path of radius 5 m at constant speed experiences an acceleration of 3 m/s2. if the radius of its path
is increased to 10 m, but its speed remains the same, what is its acceleration?
0.3 m/s2
1.5 m/s2
6 m/s
12 m/s2

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?