Calcula la velocidad de retroceso de un arma de fuego de 1,2 kg de masa que dispara un proyec-
til de 24 g a una velocidad de 500 m/s.

Answer is in the file below

https://cutt.ly/kzjInUL

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )