   Chapter 4.2, Problem 4.3QQ

Chapter
Section
Textbook Problem

Respond to each statement, true or false: (a) No force of gravity acts on an astronaut in an orbiting space station. (b) At three Earth radii from the center of Earth, the acceleration of gravity is one-ninth its surface value. (c) If two identical planets, each with surface gravity g and volume V, coalesce into one planet with volume 2V, the surface gravity of the new planet is 2g. (d) One kilogram of gold would have greater value on Earth than on the Moon.

(a)

To determine

To say True or False: No force of gravity acts on an astronaut in an orbiting space station.

Explanation

The formula for the gravitational force is,

FG=Gmemar2

Here, G is the gravitational constant,

(b)

To determine

To say True or False: At three Earth radii from the center of Earth, the acceleration of gravity is one ninth its surface value.

(c)

To determine

To say True or False: If two identical plants, each with surface gravity g and volume V, coalesce into one planet with volume 2V, the surface gravity of the new planet is 2g.

(d)

To determine

To say True or False: One kilogram of gold would have greater value on Earth than on the Moon.

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