What is the sun's energy that enters the atmosphere?

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

Does anyone have the answers to online physics course plato course physics, semester a v3.0