An empty 1160 kg car has its cm 2.40 m behind the front of the car. how far from the front of the car will the cm be when two people sit in the front seat 2.80 m from the front of the car, and three people sit in the back seat 3.90 m from the front? assume that each person has a mass of 70.0 kg.
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Ответ:
cm = 2.65m
Explanation:
The center of mass is given by: cm = sum of momenta / total mass
cm = 1160kg * 2.4m + 2 * 70kg * 2.8m + 3 * 70kg * 3.9m / (1160kg + 5 * 70kg)
Ответ:
8.15m. La altura de la casa de la cual se deja caer un objeto que tarda en caer es de 8.15m.
La clave para resolver este problema es mediante caída libre, la velocidad inicial del objeto es 0 por lo que podemos calcular la altura h de la casa mediante la relación .
Conocemos la gravedad y el tiempo en que tarda en caer el objeto , sustituyendo los valores tenemos que: