Gravity Concepts

What is the gravitational force?

• The gravitational force is the force of attraction between two objects with mass.

• The gravitational force is the force of attraction between an object with mass and an object without mass.

• The gravitational force is the force of attraction between two objects with charge.

• The gravitational force is the force of attraction between two objects with mass.

State Newton's law of universal gravitation.

• Every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

• The force of gravity is constant regardless of distance

• Gravity only affects objects on Earth

• Objects repel each other based on their masses

What is the acceleration due to gravity on Earth?

• 8.93 m/s²

• 6.67 m/s²

• 9.81 m/s²

• 10.25 m/s²

Define escape velocity.

• The maximum velocity an object can achieve in space

• The minimum velocity an object must have to break free from the gravitational attraction of a planet or other celestial body without further propulsion.

• The rate at which an object falls to the ground

• The speed at which an object enters a black hole

Explain the concept of weightlessness in space.

• Weightlessness in space is experienced due to objects being in free fall and only subject to gravity, creating the sensation of weightlessness.

• Weightlessness in space is a result of objects being anchored to the spacecraft.

• Weightlessness in space occurs due to the lack of air resistance.

• Weightlessness in space is caused by the presence of anti-gravity devices.

How is gravitational potential energy defined?

• The energy an object possesses due to its position in a gravitational field.

• The energy stored in a battery

• The energy of an object in motion

• The energy released during a chemical reaction

What factors affect the gravitational force between two objects?

• Age of the objects and material composition

• Color of the objects and shape of the objects

• Masses of the objects and distance between them

• Temperature of the objects and speed of light

Calculate the gravitational force between two objects with masses of 5 kg and 10 kg separated by a distance of 2 meters.

• 2.76 x 10^-10 N

• 8.21 x 10^-11 N

• 1.67 x 10^-10 N

• 3.45 x 10^-10 N

What is the formula to calculate acceleration due to gravity?

• g = G * (m1 / m2) / r^2

• g = G * (m1 * m2) / r^2

• g = G * (m1 + m2) / r^2

• g = G * (m1 - m2) / r^2

How does the acceleration due to gravity change with altitude?

• The acceleration due to gravity decreases with altitude.

• The acceleration due to gravity becomes zero at high altitudes.

• The acceleration due to gravity increases with altitude.

• The acceleration due to gravity remains constant with altitude.