SCIENCE TEST TUESDAY

Pressure

The concentration of a force on an area, calculated using the equation Pressure = force ÷ area.

Force

Measured in Newtons (N), it is the push or pull applied to an object.

Area

The surface over which a force is distributed, measured in cm² or m².

Pressure Units

Pressure is measured in N/cm² or N/m², and 1 N/m² is equivalent to 1 Pascal (Pa).

Liquid Expansion

When a liquid freezes, it expands slightly, resulting in less pressure.

Gas Compression

Compressing a gas into a smaller area increases the pressure.

Water Pressure

Water pressure changes with depth and depends on depth, not the container.

Depth and Pressure

The deeper you go in water, the more pressure is applied.

Gas Behavior

Cooling a gas compresses it, slowing down particles, while heating it causes particles to spread apart and move faster.

Moment

The turning effect of a force around a pivot point.

Moment Calculation

To calculate a moment, you need the distance from the pivot and the size of the force applied.

Moment Equation

Moment = Force × Distance.

Equal and Opposite Moments

In a balanced beam, moments are equal and opposite, resulting in equilibrium.

Equilibrium

A state where opposing forces or influences are balanced.