A long distance runner is running at a constant speed of 5 m/s. How long does it take travel 125 m

Which best represents the law of conservation of mass ?

For which pair of objects would adding the same a

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.