In which direction does the gravity of the earth act? why do the satellite not fall while revolving around the earth.

Satellites don't fall from the sky because they are orbiting Earth. Even when satellites are thousands of miles away, Earth's gravity still tugs on them. Gravity--combined with the satellite's momentum from its launch into space--cause the satellite go into orbit above Earth, instead of falling back down to the groundv

Explanation:

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

your answer is, orbit around the nucleus