After class one day, two physics learners get into an argument about rotational dynamics. Jack thinks the nickel in his pocket would beat Jill's silver ring in a race down an incline, but Jill is convinced her ring would win. To settle their argument, Jack and Jill climb up a 20 meter hill inclined at 30o to the horizontal. Both objects are released from rest at the top of the hill and roll without slipping all the way to the bottom. Obtain the translational speed of each object when it reaches the bottom? Find how long does each object take to get from the release point to the bottom of the hill?