Exploring Newton's Law of Gravitation

What is the definition of gravitational force?

• Gravitational force is the force that repels two masses.

• Gravitational force is the energy produced by a mass in motion.

• Gravitational force is the force that acts only on objects in space.

• Gravitational force is the force of attraction between two masses.

What is the value of the universal gravitational constant (G)?

• 6.67430 × 10^-11 m^3 kg^-1 s^-2

• 3.14159 m^3 kg^-1 s^-2

• 9.81 m/s^2

• 6.67430 × 10^-10 m^3 kg^-1 s^-2

How does gravitational potential energy depend on mass and height?

• Gravitational potential energy depends directly on mass and height.

• Gravitational potential energy is independent of mass and height.

• Gravitational potential energy decreases with increasing mass and height.

• Gravitational potential energy only depends on the mass of the object.

State Kepler's First Law of Planetary Motion.

• The orbit of a planet is an ellipse with the Sun at one focus.

• The orbit of a planet is a spiral path around the Sun.

• The orbit of a planet is a perfect circle with the Sun at the center.

• The orbit of a planet is a straight line from the Sun.

What does Kepler's Second Law state about planetary motion?

• Planets move in circular orbits around the Sun.

• The speed of a planet is constant throughout its orbit.

• The distance between a planet and the Sun remains unchanged.

• A line joining a planet and the Sun sweeps out equal areas in equal times.

Explain Kepler's Third Law in terms of orbital periods and distances.

• The distance of a planet from the sun is proportional to its orbital speed.

• The cube of a planet's orbital period is proportional to the square of its distance from the sun.

• The average distance from the sun has no effect on a planet's orbital period.

• The square of a planet's orbital period is proportional to the cube of its average distance from the sun.

What is the formula for calculating gravitational field strength?

• g = m/F

• g = 2 * (M/r)

• g = F * r^2

• g = F/m or g = G * (M/r^2)

How does the gravitational field strength vary with distance from the center of a mass?

• Gravitational field strength remains constant regardless of distance from the center of a mass.

• Gravitational field strength varies inversely with the square of the distance from the center of a mass.

• Gravitational field strength varies directly with the distance from the center of a mass.

• Gravitational field strength increases with distance from the center of a mass.

What are some practical applications of gravitational principles in technology?

• Applications include satellite positioning systems, structural engineering, and aerospace trajectory calculations.

• Underwater exploration devices

• Television broadcasting technology

• Weather forecasting systems

How does gravitational force affect the motion of satellites?

• Gravitational force has no effect on satellite motion.

• Gravitational force causes satellites to fall to Earth.

• Gravitational force keeps satellites in orbit by providing the necessary centripetal force.

• Satellites move faster when gravitational force is weaker.