CH 9 - Gravity

Question 1

The Universal Law of Gravity

Answer 1

the attractive force between two bodies is proportional to the product of their masses and inversely proportional to the square of the distance between them.

Question 2

The Universal Gravitation Constant

Answer 2

G is also known as the universal gravitational constant.

Question 3

Gravity and Distance

Answer 3

Any point source which spreads its influence equally in all directions without a limit to its range will obey the inverse square law

Question 4

Weight and Weightlessness

Answer 4

“perceived weight” or “effective weight” comes from the fact that he is supported by floor, chair, etc

Question 5

If all support is removed suddenly

Answer 5

weightlessness refers to a state of being in free fall in which there is no perceived support.

Question 6

Einstein’s Theory of Gravitation

Answer 6

matter and energy can distort (change the shape of) space-time, curving it; and that gravitation is an effect of the curvature