​Learning outcomes

Students are able to:
a)      Recalling attraction between different object.

b)      Recognizing factors influencing force between objects.

c)       Find out uses for finding gravitational force between objects.

1.       Can you identify the picture shown?

2.       What are the findings?

3.       Why apple did come down?

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Two persons walking on a wet surface. Suddenly one person slips due to water, his companion hold his hand to protect him from drop.

1.      Is there any force of attraction between the two persons?

2.       What is the factors affecting the magnitude of the force?

1.       What are masses?

2.       What do you observe?

3.       What is the significance of r?

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Everything in the universe attracts each other. The magnitude of the attraction between the objects directly proportional to the products of its masses and inversely proportional to the square of the distance between them.

F=G m₁ x m₂/r²