Describa brevemente como es el movimiento de un objeto en el espacio interestelar profundo. Realice un dibujo explicativo. alguien me ayuda con esto por favor

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.

What is the difference between mass density and weight density?

What is the frequency if a wave that pases a given pount 22 times in 2 seconds