Exploring Newton's Law of Gravitation

What is Newton's law of universal gravitation?

• Gravity only acts on objects in motion, not at rest.

• Only large masses attract each other with a constant force.

• Every mass repels every other mass with a force proportional to their distance.

• Every mass attracts every other mass with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.

How did Newton relate the motion of planets to gravitational force?

• Newton related the motion of planets to gravitational force through his law of universal gravitation.

• Newton believed planets were pushed by solar winds.

• Gravitational force was discovered by Galileo before Newton.

• Planets move in circular orbits due to magnetic forces.

What is the centripetal force in the context of planetary motion?

• The magnetic force acting perpendicular to the orbit.

• The force exerted by the planet's rotation outward.

• The gravitational force acting towards the center of the orbit.

• The frictional force between the planet and its orbiting body.

Describe the thought experiment involving a cannonball.

• The cannonball thought experiment shows how gravity affects only vertical motion.

• The cannonball thought experiment demonstrates the effect of air resistance on falling objects.

• The cannonball thought experiment explains the principles of thermodynamics in motion.

• The cannonball thought experiment illustrates the independence of horizontal and vertical motion.

How does the gravitational force affect objects of different sizes?

• All objects are unaffected by gravitational force.

• Gravitational force affects larger objects more strongly due to their greater mass, but all objects experience gravitational attraction.

• Larger objects do not experience gravitational attraction.

• Gravitational force only affects small objects.

What is the significance of the apple in Newton's discovery?

• The apple signifies the beginning of the scientific revolution.

• The apple is a symbol of knowledge and wisdom.

• The apple symbolizes the discovery of gravity and the universal force of attraction.

• The apple represents the discovery of electricity.

Explain the concept of free fall as it relates to planets and the Sun.

• Free fall is the process of planets creating their own gravity.

• Free fall is the result of planets pushing away from the Sun.

• Free fall occurs when planets are stationary in space.

• Free fall is the motion of planets in their orbits around the Sun, driven by the Sun's gravitational pull.

What role does gravity play in the orbits of planets?

• Gravity causes planets to move away from stars.

• Gravity has no effect on the motion of planets.

• Gravity only affects the size of planets.

• Gravity keeps planets in orbit around stars by balancing the inward pull of gravity with the outward motion of the planets.

How did Newton's laws of motion contribute to his law of gravitation?

• Newton's laws of motion were unrelated to gravitation.

• Newton's laws of motion provided the framework for understanding the forces acting on objects, which led to the formulation of his law of gravitation.

• Newton's laws only apply to objects in motion, not to gravity.

• Newton's law of gravitation was developed independently of his laws of motion.

What is the formula for calculating gravitational force?

• F = m1 * m2 / r

• F = G * m1 * m2 * r

• F = G * (m1 * m2) / r^2

• F = G * (m1 + m2) / r^2