Question 1

On a given day,tides rise and fall at

Accepted Answer

A) the same time everywhere. 
B) the same distance everywhere. 
C) different times and different distances almost everywhere. 
D) the same time and the same distance everywhere. 
A) the same time everywhere. 
B) the same distance everywhere. 
C) different times and different distances almost everywhere. 
D) the same time and the same distance everywhere.

Question 2

The reason the moon does not crash into the Earth is that the

Accepted Answer

A) Earth's gravitational field is weak at the moon. 
B) gravitational pull of other planets keeps the moon up. 
C) moon has a sufficient tangential speed. 
D) moon has less mass than the Earth. 
E) none of these 
A) Earth's gravitational field is weak at the moon. 
B) gravitational pull of other planets keeps the moon up. 
C) moon has a sufficient tangential speed. 
D) moon has less mass than the Earth. 
E) none of these

Question 3

We do not observe tides in a community swimming pool because

Accepted Answer

A) gravitation on the small mass of water is negligibly small. 
B) it is shallow compared to the ocean. 
C) all parts of it are practically the same distance from the moon. 
D) they are masked by the much stronger pull of Earth gravity. 
E) the tides are only observed at night. 
A) gravitation on the small mass of water is negligibly small. 
B) it is shallow compared to the ocean. 
C) all parts of it are practically the same distance from the moon. 
D) they are masked by the much stronger pull of Earth gravity. 
E) the tides are only observed at night.

Question 4

All places on the Earth would have high tides at the same instant if the

Accepted Answer

A) moon did not revolve. 
B) moon did not rotate. 
C) sun did not revolve. 
D) sun did not rotate. 
E) None of the above choices are correct. 
A) moon did not revolve. 
B) moon did not rotate. 
C) sun did not revolve. 
D) sun did not rotate. 
E) None of the above choices are correct.

Question 5

Two objects move toward each other because of gravity.As the objects get closer and closer,the acceleration of each

Accepted Answer

A) increases. 
B) decreases. 
C) remains constant. 
A) increases. 
B) decreases. 
C) remains constant.

Exam 9: Gravity

On a given day,tides rise and fall at

The reason the moon does not crash into the Earth is that the

We do not observe tides in a community swimming pool because

All places on the Earth would have high tides at the same instant if the

Two objects move toward each other because of gravity.As the objects get closer and closer,the acceleration of each

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