3. Un astronauta golpea una pelota de golf en la luna. ¿Cuál de las cantidades que sigue, si existe alguna, permanece constante conforme la pelota viaja a través del vacío lunar?
a. rapidez
b. aceleración
c. velocidad
d. componente horizontal de la velocidad
e. componente vertical de la velocidad

The four giant gas points that are made primarily of lightweight elements are

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?