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EXAMEN FISICA. (GRAVITACIÓN)
1º
a) Si el valor del radio terrestre es de 6370 km ¿Cuál será la intensidad del campo gravitatorio a 600 km de altura?
b) ¿Qué velocidad de orbita llevará un satélite que se halla orbitando a esa altura?
2ª Comprueba que se cumple la tercera ley de kepler.
PLANETA | RADIO ORBITAL | PERIODO |
Mercurio | 57900000 km | 88 días |
Marte | 227900000 km | 687 días |
Tierra | 149600000 km | 365 días |
3ª Un cuerpo de masa 10 kg, situado en la superficie de la luna, pesa 19,4 N. Si la masa de la luna es de 6'7 . 1022 ¿Cuanto mide el radio de la Luna?
Datos: G = 6'67 . 10-11 (SI).
4ª Calcula el campo en el punto (0,3).
Datos: G = 6'67 . 10-11 (SI).
5ª a) Al separar dos masas ¿Aumenta o disminuye su energía potencial? Justifícalo.
b) La energía mecánica de un cuerpo que orbita es siempre menor que 0. Justifícalo.
6ª Se lanza un objeto de la superficie con una velocidad 104 m/s. Calcula la altura hasta la que llegará, suponiendo nulo el rozamiento con el aire.
Datos: MT 6 . 1024 , RT = 6370 km, G=6'67 . 10-11 (SI).
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Enviado por: | El remitente no desea revelar su nombre |
Idioma: | castellano |
País: | España |