Pressure is force acting perpendicularly per unit area of a surface.
Category: Combined Physics
Define Principle of Moments
The Principle of Moments states that, when a body is in equilibrium, the sum of the clockwise moments about a pivot is equal to the sum of the anti-clockwise moments about the same pivot.
Define centre of gravity
The centre of gravity is the point which the whole weight of an object appears to act on, for any orientation of the object.
Define moment of a force
The moment of a force is the turning effect of a force, and is obtained by the product of the force and the perpendicular distance from the line of action of the force to the pivot.
Define density
Density is the mass per unit volume of a substance.
Define gravitational field strength
Gravitational field strength is the gravitational force per unit mass (N/kg).
Define gravitational field
Gravitational field is a region in which a mass experiences a force due to gravitational attraction.
Define mass
Mass is the measurement of the amount of substance in a body.
Define acceleration due to free fall
Acceleration due to free fall refers to the acceleration of an object that is near to the Earth, free-falling towards the ground. This acceleration is constant and approximately 10 m/s2.
Define speed, velocity, acceleration, uniform acceleration
Speed is the change in distance per unit time.
Velocity is the change in displacement per unit time.
Acceleration is the change in velocity per unit time.
Uniform acceleration refers to a uniform change in velocity over time.