En la retransmisión de una carrera ciclista el locutor comenta: estamos a 60 km de la meta y llevamos una velocidad media de 36 km/h. Si mantienen esa media, a) ¿A qué distancia
de la meta estarán 80 min después? b) ¿Cuánto tardarán en llegar a la meta?

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.