Gravitational Forces and Acceleration

What does Newton's law of universal gravitation describe?

• The energy required to lift an object

• The acceleration of an object in free fall

• The force of attraction between two masses

• The force between two charged particles

According to Newton's second law, what is the net force acting on an object equal to?

• The difference between gravitational and normal force

• The sum of all forces acting on the object

• The product of mass and acceleration

• The product of mass and velocity

How is gravitational acceleration represented in the formula derived from Newton's laws?

• g = G/r^2

• g = Gm/r

• g = Gm/r^2

• g = mG/r^2

What is the approximate value of Earth's gravitational acceleration near its surface?

• 8.91 m/s²

• 9.81 m/s²

• 10.81 m/s²

• 11.81 m/s²

What does the negative sign in the gravitational acceleration formula indicate?

• The force is repulsive

• The force is negligible

• The force is attractive

• The force is constant