Grass obtains 10% of the energy of the sun. when a mouse eats the grass, it gets only of the sun's energy while is lost as heat. 0.1%; 0.9% 1%; 0.9% 0.01%; 0.009%

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.