Physics Test 1

Consider a space probe three times as far from Earth's center as it would be at Earth's surface. Compared to at Earth's surface, its gravitational attraction to Earth at this distance is about _______.

1/9th as much

An astronaut lands on a planet that has the same mass as Earth but half the diameter. How does the astronaut's weight differ from that on Earth?

Astronaut has four times as much weight as on Earth.

Which of the following quantities would be acceptable representations of weight?

LBS, kN, MN

The Moon falls toward Earth in the sense that it falls:

beneath the straight-line path it would take without gravity

Which of the following quantities represent mass?

g and kg

An object is lifted from the surface of a spherical planet to an altitude equal to the radius of the planet. As a result, which of the following changes in the properties of the object take place?

mass remains the same; weight decreases

When an astronaut in orbit is weightless, he or she is _______.

still in the grips of Earth's gravity

The gravitational field on the surface of the earth is stronger than that on the surface of the moon. If a rock is transported from the moon to the earth, which properties of the rock change?

weight only