Report
Preparation of water bottle
A water bottle was poked using a pair of scissors. A small
hole was formed around 1cm above the bottom. The edge
of the hole was painted black in order t o identify the
position.
Experiment (1)
The hole was blocked by one finge r wh ile water was filled into the water bottle. One­
third of the wate r bottle was filled with water. The hole was unblocked by the finger
over the sink. The result was observed and recorded.
Experiment (2)
The bucket was placed in front of the step-stool. The hole was blocked by a finger
and thre e-quarters of the water bottle was filled with water. The water bottle was
brought above the bucket by the experimenter (i.e., me) wh ile the experimenter
stood on the step-stool. The finge r was released from the hole. The result was
recorded. Then, the water bottle was released from the hand. The result was
observed.
Result:
the plate slowly. Keep twirling back and forth for a while
until the motion of the plate stopped spontaneously.
Result
1.
When the experimenter(i.e., I) stopped acting a force to the plate, the plate
would still move in a circular path for a while. After that, it would stop the
motion after s wing ing forth and back several times.
2.
The plate could not sharply stop without spilling water or dropping the bowl.
3.
The plastic bowl did not fall or slightly mov ed from its position.
4.
No water was spilt out.
5.
When swinging the plate, a force kept pulling the experimenter's(i.e., my) hand
along the strings.
Report1+2
GRADEMARK REPORT
FINAL GRADE
GENERAL COMMENTS
24
Instructor
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