Physics Lecture on Vectors and Forces

These flashcards cover key concepts related to vectors and forces from the physics lecture, including definitions of resultant, equilibrium, Newton's laws, and different types of forces.

What is a resultant in physics?

The vector sum of two or more vectors or a single vector having the same effect.

What does equilibrium refer to in a physical context?

A state where all the forces acting on an object result in a net force of 0.

What is an equilibrant?

A single vector that, when added to a system of vectors acting on an object, will result in equilibrium.

What is a closed vector diagram?

A diagram that shows the forces acting on an object that is in equilibrium.

Define normal force.

The force or component which a surface exerts on an object in contact with it, perpendicular to the surface.

What is frictional force?

The force that opposes the motion of an object and acts parallel to the surface.

Describe static frictional force.

The force that opposes the tendency of motion of a stationary object.

What is kinetic frictional force?

The force that opposes the motion of a moving object relative to a surface.

State Newton's first law of motion.

A body will remain in its state of rest or motion at a constant velocity unless a non-zero resultant/net force acts on it.

What is inertia?

The resistance of an object to any change in its state of motion.

State Newton's second law of motion.

When a resultant/net force acts on an object, it will accelerate in the direction of the forces, at an acceleration directly proportional to the force and inversely proportional to the mass of the object.

Define acceleration.

The rate of change in velocity of an object.

What is Newton's third law of motion?

For every action, there is an equal and opposite reaction.