Which statement below correctly describes earth's gravity?

a. the pull of earth's gravity depends only on the mass of the object.
b. the pull of earth's gravity on an object is not affected by the object's distance from earth.
c. as objects get farther from earth, the pull of earth's gravity increases.
d. as objects get closer to earth, the pull of earth's gravity increases.

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.)