A marble (m=0.05 kg, r=0.01 m) is placed on an incline at a height of 0.5 m and allowed to roll down the incline. What is the marbles translational velocity when it reaches the bottom of the incline?
a) 0.9 m/s
b) 1.8 m/s
c) 2.6 m/s
d) 4.2 m/s
e) 7 m/s