Un avió de 10000kg vola horitzontalment a 9 km d'altura i té una energia mecànica de 109 J, calculeu: a) Les energies potencial i cinètica en aquesta posició. b) La seva velocitat.

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •  

Aracecar driver has to hold on tightly when going around a banked curve. approximately what is the centripetal force on a 2220.0 kg car going around a circle with a diameter of 190.0 meters at 25.0 m/s?

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat