Which of newtons laws explain the orbit of a space shuttle around earth and the orbit of earth and the sun? answer asap! : )

In the image, the arrow is pointing to a celestial object. which attribute disqualifies the object from being a planet?

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)