Popeye wants to row his boat directly across the river from where he started on the w shore. the width of the river is 250.0 m, and the current is flowing from north to south with a speed of 0.51 m/s. the trip takes popeye 4.2 minutes. with what speed does popeye have to row, with respect to the water to make this trip? answer in m/s.

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.