Physics: Levers, Forces, Motions, and Electric Circuits

These flashcards cover key concepts related to levers, forces, motions, and electric circuits as discussed in the lecture.

Moment

The turning effect experienced by an object around a pivot.

Pivot

A fixed point around which a lever turns.

Force

A push or pull that can change the motion, direction, or shape of an object.

Contact forces

Forces that occur when two objects touch each other.

Non-contact forces

Forces that act at a distance, such as gravitational or magnetic forces.

Resultant force

The single force that results from combining two or more forces acting on an object.

Balanced forces

Forces that cancel each other out, resulting in no change in motion.

Upthrust

An upward force exerted by a fluid on an object submerged in it.

Ohm's Law

The relationship V = IR, where V is voltage, I is current, and R is resistance.

Voltage

The measure of the electrical energy difference across a device, measured in volts.

Resistance

The opposition to the flow of electric current, measured in ohms.

Series Circuit

A circuit where the current flows through each component in a single pathway.

Parallel Circuit

A circuit where the current is split across multiple pathways.

Electric field

An area around a charged object where it can exert force on other charges.

Current

The flow of electric charge, typically measured in amperes (A).

Electromotive force (EMF)

The voltage developed by any source of electrical energy such as a battery.