To find acceleration of gravity, dump rather heavy body, it is desirable metal, from some height and note falling time, then calculate acceleration of gravity by a formula. Or measure the gravity which affects a body of the known weight and divide value of force into this weight. It is possible to use the mathematical pendulum.
It is required to you
- electronic and usual stop watch, metal body, scales, dynamometer and mathematical pendulum.
Instruction
1. Finding of the acceleration of gravity which is freely falling you telavozmit a metal body, and attach it to a bracket at some height which measure in meters at once. Below stop the special platform. Attach a bracket and the platform to an electronic stop watch. Height has to be picked up so that resistance of air could be neglected. It is recommended to choose height from 2 to 4 m. After that disconnect a body from a bracket, as a result it will begin to fall freely. After blow about the platform the stop watch will record falling time in seconds. After that divide value of height into the value of time taken in the second degree, and increase result by 2. Receive value of acceleration of gravity in m / с2.
2. Finding of acceleration of gravity with a great effort of weight Measure on scales body weight in kilograms with high precision. Then, take a dynamometer and suspend on it this body. But will show value of gravity in newtons. After that divide value of gravity into body weight. As a result receive acceleration of gravity.
3. Finding of acceleration of gravity by means of the mathematical pendulum Take the mathematical pendulum (the body suspended on rather long thread) and force it to hesitate, previously having measured thread length in meters. Include a stop watch and count a number of fluctuations and note time in seconds for which they were made. After that divide the number of fluctuations for a while in seconds, and build the received number in the second degree. Then increase it by length of the pendulum and number 39.48. As a result we will receive acceleration of gravity.