The Radius of Earth Is 6,378 Km

question 22

Multiple Choice

The radius of Earth is 6,378 km. The force of gravity on a 1 kg ball at Earth's surface is 9.8 kg m/s².  What is the force of gravity on this same ball when the ball is located 12,756 km from Earth's center? Hint: G = 6.67  10^-11 m³/s²/kg

• A) 2.45 kg m/s²
• B) 4.9 kg m/s²
• C) 9.8 kg m/s²
• D) 19.6 kg m/s²
• E) 39.2 kg m/s²