1. If the Moon were to suddenly come to rest so that it is no longer revolving a

Question

1. If the Moon were to suddenly come to rest so that it is no longer revolving around the Earth, but everything else remained the same, what would happen to the Moon?

A. The Moon would start accelerating toward the earth with an acceleration of 9.8 m/s2 B. The Moon would start traveling toward the Earth at a constant speed C. The Moon would remain at rest D. The Moon would start accelerating toward the earth with an acceleration less than 9.8 m/s2 E. The Moon would start accelerating toward the earth with an acceleration more than 9.8 m/s2

2. Suppose you drop a book. As the book is falling to the ground, which of the following statements is true?

3. One of your classmates, Kevin, is trying to calculate the acceleration due to gravity at the top of Mt. Everest. Looking at an equation sheet, he sees that the acceleration due to gravity is g=GM/r^2. For G, he plugs in the gravitational constant. For M, he plugs in the mass of the Earth. For r, Kevin plugs in the elevation (the height above sea level) of Mt. Everest. Will Kevin arrive at the right answer for g at the top of Mt Everest?

A. The magnitude of the force that the Earth exerts on the book is larger than the magnitude of the force that the book exerts on the Earth B. Because the book is in free fall, there is no force between the Earth and book. C. The magnitude of the force that the Earth exerts on the book is smaller than the magnitude of the force that the book exerts on the Earth D. The magnitude of the force that the Earth exerts on the book is the same as the magnitude of the force that the book exerts on the Earth

Explanation / Answer

1. D. The Moon would start accelerating toward the earth with an acceleration less than 9.8 m/s2

2. D. The magnitude of the force that the Earth exerts on the book is the same as the magnitude of the force that the book exerts on the Earth

3 B. No, his answer will be larger than the correct answer
height of everest is small compare to radius of earth for r variable he have to take ( radius + height of everest)   

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