- What is Pressure?
defined to be the amount of force exerted pen area.
- What is the formula and units fon calculating pressure ?
Force: N
Area: M to the power of 2
Pressure: N/m to the power of 2
Pressure: Force/Area
Area: Force/Pressure
Force: Area x Pressure
What is Boyle’s Law?
Boyle’s law is a gas law that states that a gas’s pressure and volume are inversely proportional.
Example: ventilation in lungs
How can we calculate the moment of a force?
moment = force x distance from the pivots
Therefore, the tunning effect of a force depends on it things:
- The greater the force, the greater the turning effect line opening a doon when your in a hurry)
- The further the force is from the pivot, the greater it’s turning effect.
concept of moment
he moment is a way to tell how strong a push or pull makes something spin or turn.
Usage of a moment in daily life
Opening and closing of a door, a long fixed hinge, and a sea saw
Law of inertia
an object at rest remains at rest, and an object in motion remains at motion in constant speed, and in a straight line unless acted on by an unbalanced force
Law of force
A larger net force acting on an object causes a larger acceleration, and an object with a larger mass requires more force to accelerate.
Law of action and reaction
whenever an object exerts a force on a second object, the second object exerts an equal and opposite force on the fisrt
what is density
is how much mass a substance has per unit of its volume
Density calculations
density= mass/volume
