All Flashcards
Define Dynamics.
The study of forces and their effect on motion, explaining why objects move as they do.
What is Weight (Force of Gravity)?
The force pulling an object down due to gravity, calculated as , where g is the acceleration due to gravity.
Define Normal Force.
The force exerted by a surface on an object, always perpendicular to the surface.
What is Tension?
The pulling force exerted by a string, rope, cable, or similar object on another object.
Define Friction.
A force that opposes motion between surfaces in contact.
What is a System in Physics?
A defined collection of objects being studied, crucial for determining internal and external forces.
Define Gravitational Field.
The region around a massive object where other massive objects experience a gravitational force.
What is Inertia?
The tendency of an object to resist changes in its state of motion.
What is the effect of applying a net force on an object?
The object accelerates in the direction of the net force, as described by Newton's Second Law ().
What happens when the net force acting on an object is zero?
The object's velocity remains constant (including zero), according to Newton's First Law.
What is the effect of increasing the mass of an object while applying the same force?
The acceleration of the object decreases, as described by Newton's Second Law ().
What is the effect of a non-zero net force acting on an object?
The object accelerates in the direction of the net force.
What happens when the distance between two masses increases?
The gravitational force between them decreases (inversely proportional to the square of the distance).
What is the effect of increasing the mass of an object, given a constant net force?
The acceleration of the object decreases.
What happens when an object accelerates vertically?
Its apparent weight changes.