gravity-pendullum

this is my group photos :)

At 26 January 2012 we were divided into 3 group . then we have a gravitational force project and at that time we are learning about forces.


what we observe at that experiment is :
*what happen when two object of the same shape but different mass are released from the same height .


what do we need for the gravitational force is:

this is the example of the two bottle

 

1. two similar plastic bottles ( one filled with water , the other is empty)

this is the example of the small rug

2. 1 a small rug 

this is the example of the low chair :)

3. low chair .




procedures:
 1. works in 3 group. place the rug in the ground.

 2. hold a plastic bottles , one in each hand . with your arms stretched out in front of you , drop both bottles at the same time . observe how they fall.

3. now stand on a low chair . drop both bottles again with your arms outstretched. observe how they fall.

so at 26 January 2012 , we were divided into 3 group i was in the same group with Clauvinna and Brian then  we was filling one bottle with water and the other bottle without water then i was not standing in the chair then i stretched my hands and drop the two bottles , then when i was drop the bottles, Clauvinna and Brian was observe the two bottles and find who dropped first at the first time. then we observe again with standing on the chair , we take the chair and then this time  i was outstretched my hands and drop the two bottles ,  then Clauvinna and Brian observe again . And then we observe that the two bottles was falls down together but the bottles with water is falls faster than the bottles without water. this is because the bottles without the water has more air resistance and the bottle that is with water has more less air resistance . and now we have observed.