SCIENCE FORM 2

PBS BAND 5

TemaDManagement and Continuity Of Life

Bab9Stability

Topik9.1Understanding that the centre of gravity affects stability

Band 5Mengamal dan menilai maklumat saintifik untuk menyiasat luas tapak dan kedudukan pusat gravity terhadap kestabilan objek mengikut prosedur yang betul dan bersistematik.

1. An object is said to be stable if it is steady and well balanced so that when it is pushed slightly it does not topple or fall off easily. Let us try to do a simple experiment or derive the conditions for stability.

(a) Suggest one hypothesis to investigate the above statement.

(b) Using two corks, three needles and a other suitable apparatus, describe one experiment to test the hypothesis in 1(a).

Your description should include the following criteria:

i. Aim of the experiment

ii. Problem statement

iii. Identification of variables

iv. List of apparatus and materials

v. Procedure and diagram

vi. Observation

vii. discussion

viii. Conclusion

SAMPLE REPORT

Aim of the experiment

Problem statement

Hypothesis

Variables

Apparatusand materials

Procedure and diagrams

Observation

Discussion1. Which model will topples first?

Give inference.

2. State the relationship between the base area and the stability of the model.

ConclusionIs your hypothesis acceptable?

Rewrite your hypothesis.

SCIENCE FORM 2

PBS BAND 5

TemaDManagement and Continuity Of Life

Bab9Stability

Topik9.1Understanding that the centre of gravity affects stability

Band 5Mengamal dan menilai maklumat saintifik untuk menyiasat luas tapak dan kedudukan pusat gravity terhadap kestabilan objek mengikut prosedur yang betul dan bersistematik.

2. As the centre of gravity( C.G.) of a body is raised the body becomes more unstable. This is because when the body is tilted the vertical line drawn from the C.G. falls outside the base.

(a) Suggest one hypothesis to investigate the above statement.(b) Using suitable apparatus, describe one experiment to test the hypothesis in 2(a).

Your description should include the following criteria: i. Aim of the experiment

ii. Problem statement

iii. Identification of variables

iv. List of apparatus and materials

v. Procedure and diagram

vi. Observation

vii. discussion

viii. Conclusion

SAMPLE REPORT

Aim of the experiment

Problem statement

Hypothesis

Variables

Apparatusand materials

Procedure and diagrams

Observation

Discussion1. Which model will topples first?

Give inference.

2. State the relationship between the base area and the stability of the model.

ConclusionIs your hypothesis acceptable?

Rewrite your hypothesis.

When give a slight push to the vases. You will notice that the vase in situation A topples down while the vase in situation B remains back to the original position

B

A

The extra passengers are not allowed to be on the upper deck of a bus. If they are allowed to stand in the upper deck the C.G will be raised and the bus will be more unstable when it takes a sharp turn.