All Flashcards
What is the effect of increasing the mass of two objects on the gravitational force between them?
Increasing the mass of either object will increase the gravitational force between them.
What happens to apparent weight when an elevator accelerates upwards?
Apparent weight increases; you feel heavier.
What happens to apparent weight when an elevator accelerates downwards?
Apparent weight decreases; you feel lighter.
What is the effect of being inside a uniform spherical shell of mass?
The net gravitational force on an object inside the shell is zero.
What is the effect of increasing the distance between two objects on the gravitational force between them?
Increasing the distance decreases the gravitational force between them, following an inverse square relationship.
What happens when an object is in freefall?
The object experiences weightlessness, with gravity being the only force acting on it.
Define Newton's Law of Universal Gravitation.
The force of attraction between any two objects with mass, directly proportional to the product of the masses and inversely proportional to the square of the distance between their centers.
What is the gravitational field model?
A way to visualize how gravity affects objects in space, predicting how objects move under gravity’s influence without direct contact.
Define gravitational field strength (g).
The gravitational force per unit mass, expressed as .
What is weight?
The gravitational force exerted on an object by a celestial body.
Define apparent weight.
The force you feel (the normal force), which isn't always the same as your actual weight (gravitational force).
What is inertial mass?
A measure of how much an object resists changes in its motion.
What is gravitational mass?
The property of an object that determines the strength of its gravitational interaction with other objects.
Define weightlessness.
The sensation of having no weight, either because no forces are acting on you, or gravity is the only force acting on you.
Define Newton's Law of Universal Gravitation.
The gravitational force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers of mass: F = G rac{m_1 m_2}{r^2}
What is gravitational field strength ()?
Gravitational field strength is the gravitational force per unit mass: g = rac{F}{m}
Define weight in the context of gravitational force.
Weight is the gravitational force exerted by a large astronomical body on a smaller nearby object:
What is apparent weight?
Apparent weight is the magnitude of the normal force acting on an object. It's what you feel as weight.
Define inertial mass.
Inertial mass measures an object's resistance to changes in motion when interacting with another object.
What is gravitational mass?
Gravitational mass relates to the force of attraction between two objects with mass.