Question

As planets move toward the sun, they tend to: A. move at constant speed B. speed up C. burn up D. slow down

Answer 1

Answer:

B. speed up

Explanation:

The acceleration of an object due to a body's gravity is:

g = GM / r²

where G is the universal constant of gravitation,

M is the mass of the body,

and r is the distance from the body.

As a planet approaches the sun, r decreases.  As r decreases, g increases.