12-02-2018, 04:01 PM
introduction
Galileo was showing the first person that at any place, all bodies - large or
Small - falls when the same (uniform) is dropped with acceleration, if
Resistance due to wind is negligible. Body's gravitational attraction
The result of the center of the earth is in one acceleration for all the bodies at one.
In spite of special place, their mass, size or content, and this
Acceleration is called acceleration due to gravity, g. G's value is different
Place to place, largest on the pole and at least on the equator
Because this value is large, the bodies fall quickly on the surface of the earth
Dropped, and therefore it is difficult to measure with their acceleration directly
Quite accuracy
Therefore, acceleration due to gravity is often determined indirectly
- For example, using a simple pendulum or mixed pendulum. if we
Determining G using a simple pendulum, the result is not very accurate because one
Ideal simple pendulum can not be applied under laboratory conditions. Therefore, you
Due to the acceleration, two different compound pendulums will be used to determine
Gravity in the laboratory, i.e. the bar pendulum and caterpillar pendulum.
equipment
bar pendulum
small metal nail
Level of the soul
telescope
Stop the clock
meter scale