Two solid metal balls, a small and a large one, are made of the same type of steel, with no empty space inside. The large ball has a radius twice as large as the small ball. The two balls roll down a ramp, starting from the same height. Assume the balls do not slip and air friction can be neglected. What can you say about the speeds of the balls when they reach the bottom of the ramp.
 

a). The small ball has a speed 1.41 times larger than the large ball.
b). The two balls have the same speed.
c). The large ball has a speed 2 times larger than the small ball.
d). The small ball has a speed 2 times larger than the large ball.
e). The large ball has a speed 1.41 times larger than the small ball.