Презентация на тему Physics 1 for KMA

torque.
Properties of fluids.
Flotation.
Bernulli equation.

rotating about a fixed axis, every particle of the

moves in a circle whose center is the axis

centripetal one, so the magnitude of total linear acceleration

The right hand rule is applied: If the fingers

energy

Geometries

axis through the center of mass of an object

object pivoted about an axis, the object tends to

about axis O as F increases and as the

counterclockwise about O, and F2 tends to rotate it

We use the convention that the sign of the torque resulting from a force is positive if the turning tendency of the force is counterclockwise and is negative if the turning tendency is clockwise. Then

The force F1 tends to rotate the object counterclockwise about O, and F2 tends to rotate it clockwise.

not be confused with force. Forces can cause a

which equals zero, as

an instantaneous angular momentum.


The torque acting on a particle

a system about some axis passing through an origin

for each particle of an object:

Angular momentum for the

momentum of a system is constant if the resultant

can result in change of its angular velocity.

his body he spins faster.

mechanical energy, linear momentum and angular momentum of an

rotating a symmetric rigid object about a fixed axis

suspending a relatively massive rotor inside three rings called

of balance and maintains the direction of the high

try to reorient to keep the spin axis of

ratio of the density of a substance to the

of the substance's volume to its mass. It is

column manometer is proportional to the pressure difference.
P1-P2=ρgh

= m/V = fluid density
g = gravitational acceleration
h =

particular direction. The unit of thrust, therefore is the

the bottom of an atmospheric sea. The standard atmospheric

metal box called an aneroid cell (capsule), which is

fluid is transmitted equally in all directions throughout the

suction pump, operates as follows:
on the upstroke of

pressure pump, operates as follows:
on the upstroke of

equivalent height that a fluid is to be pumped,

Lift + Friction Loss
Static Height is the maximum height

the resistance to the movement of an object through

required to move a plate at constant speed against

boundary layer is formed. This causes a net drag

of liquid viscosity is the phenomenon by which liquid

here η0 and b are constants.
This is an empirical model that usually works for a limited range of temperatures.

amplitude of oscillations in an oscillatory system
Fluid viscous damping

increases with depth and from the fact that the

is equal to the weight of the fluid displaced.

measure the specific gravity (or relative density) of liquids;

is lighter.

fluid is more useful in applications like the Bernoulli

fluid is more useful in applications like the Bernoulli

fluid pressure that results when a fluid flows through

can be used to measure the flow rate.

of a motive liquid to entrain another liquid, completely