Desde una altura de 150 metros se deja caer libremente una pelota. ¿Cuánto ha descendido a los 4 segundos?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

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.

Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point