Suppose you have a pendulum clock which keeps correct time on Earth (acceleration due to gravity = 9.8 m/s2). Without changing the clock, you take it to the Moon (acceleration due to gravity = 1.6 m/s2). For every hour interval (on Earth) the Moon clock will record:

A) (9.8/1.6) h B) 1 h C) D) (1.6/9.8) h E) A) (9.8/1.6) h B) 1 h C) D) (1.6/9.8) h E)

The orbit of a certain a satellite has a semimajor axis of 1.5 * 107 m and an eccentricity of 0.20. Its perigee (minimum distance) and apogee (maximum distance) are respectively:

A) 1.2 * 107 m, 1.8 *107 m B) 3.0 * 106 m, 1.2 * 107 m C) 9.6 *106 m, 1.0 * 107 m D) 1.0 *107 m, 1.2 *107 m E) 9.6 * 106 m, 1.8 * 107 m A) 1.2 * 107 m, 1.8 *107 m B) 3.0 * 106 m, 1.2 * 107 m C) 9.6 *106 m, 1.0 * 107 m D) 1.0 *107 m, 1.2 *107 m E) 9.6 * 106 m, 1.8 * 107 m

Exam 13: Gravitation

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Planet 1 and planet 2 are both in circular orbits around the same central star. The orbit of planet 2 has a radius that is much larger than the radius of the orbit of planet 1. This means that:

(Multiple Choice)

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Question 21

To measure the mass of a planet with the same radius as Earth, an astronaut drops an object from rest (relative to the planet) from an altitude of one radius above the surface. When the object hits its speed is 4 times what it would be if the same experiment were carried out for Earth. In units of Earth masses, the mass of the planet is:

(Multiple Choice)

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Question 22

An artificial satellite of the Earth releases a bomb. Neglecting air resistance, the bomb will:

(Multiple Choice)

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Question 23

A planet travels in an elliptical orbit about a star as shown. At what pair of points is the speed of the planet the same?

(Multiple Choice)

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Question 24

The speed of a comet in an elliptical orbit about the sun:

(Multiple Choice)

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Question 25

The mass of a hypothetical planet is 1/100 that of Earth and its radius is 1/4 that of Earth. If a person weighs 600 N on Earth, what would he weigh on this planet?

(Multiple Choice)

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Question 26

A small satellite is in elliptical orbit around Earth as shown. If L denotes the magnitude of its angular momentum and K denotes kinetic energy:

(Multiple Choice)

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Question 27

An astronaut finishes some work on the outside of his satellite, which is in circular orbit around the Earth. He leaves his wrench outside the satellite. The wrench will:

(Multiple Choice)

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Question 28

Given the perihelion distance, aphelion distance, and speed at perihelion of a planet, which of the following CANNOT be calculated?

(Multiple Choice)

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Question 29

Assume that Earth is in circular orbit around the Sun with kinetic energy K and potential energy U, taken to be zero for infinite separation. Then, the relationship between K and U:

(Multiple Choice)

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Question 30

A projectile is fired straight upward from Earth's surface with a speed that is half the escape speed. If R is the radius of Earth, the highest altitude reached, measured from the surface, is:

(Multiple Choice)

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Question 31

A planet is in circular orbit around the Sun. Its distance from the Sun is four times the average distance of Earth from the Sun. The period of this planet, in Earth years, is:

(Multiple Choice)

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Question 32

An artificial Earth satellite is moved from a circular orbit with radius R to a circular orbit with radius 2R. During this move:

(Multiple Choice)

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Question 33

Earth exerts a gravitational force on the Moon, keeping it in its orbit. The reaction to this force, in the sense of Newton's third law, is:

(Multiple Choice)

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Question 34

A spring scale, calibrated in newtons, is used to weigh sugar. If it were possible to weigh sugar at the following locations, where will the buyer get the most sugar to a newton?

(Multiple Choice)

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Question 35

The magnitude of the acceleration of a planet in orbit around the Sun is proportional to:

(Multiple Choice)

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Question 36

Venus has a mass of about 0.0558 times the mass of Earth and a diameter of about 0.381 times the diameter of Earth. The acceleration of a body falling near the surface of Venus is about:

(Multiple Choice)

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Question 37

Suppose you have a pendulum clock which keeps correct time on Earth (acceleration due to gravity = 9.8 m/s²). Without changing the clock, you take it to the Moon (acceleration due to gravity = 1.6 m/s²). For every hour interval (on Earth) the Moon clock will record:

(Multiple Choice)

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Question 38

The orbit of a certain a satellite has a semimajor axis of 1.5 * 10⁷ m and an eccentricity of 0.20. Its perigee (minimum distance) and apogee (maximum distance) are respectively:

(Multiple Choice)

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Question 39

In planetary motion the line from the star to the planet sweeps out equal areas in equal times. This is a direct consequence of:

(Multiple Choice)

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Question 40

Showing 21 - 40 of 55

Exam 13: Gravitation

Planet 1 and planet 2 are both in circular orbits around the same central star. The orbit of planet 2 has a radius that is much larger than the radius of the orbit of planet 1. This means that:

An artificial satellite of the Earth releases a bomb. Neglecting air resistance, the bomb will:

A planet travels in an elliptical orbit about a star as shown. At what pair of points is the speed of the planet the same?

The speed of a comet in an elliptical orbit about the sun:

The mass of a hypothetical planet is 1/100 that of Earth and its radius is 1/4 that of Earth. If a person weighs 600 N on Earth, what would he weigh on this planet?

A small satellite is in elliptical orbit around Earth as shown. If L denotes the magnitude of its angular momentum and K denotes kinetic energy:

An astronaut finishes some work on the outside of his satellite, which is in circular orbit around the Earth. He leaves his wrench outside the satellite. The wrench will:

Given the perihelion distance, aphelion distance, and speed at perihelion of a planet, which of the following CANNOT be calculated?

Assume that Earth is in circular orbit around the Sun with kinetic energy K and potential energy U, taken to be zero for infinite separation. Then, the relationship between K and U:

A projectile is fired straight upward from Earth's surface with a speed that is half the escape speed. If R is the radius of Earth, the highest altitude reached, measured from the surface, is:

A planet is in circular orbit around the Sun. Its distance from the Sun is four times the average distance of Earth from the Sun. The period of this planet, in Earth years, is:

An artificial Earth satellite is moved from a circular orbit with radius R to a circular orbit with radius 2R. During this move:

Earth exerts a gravitational force on the Moon, keeping it in its orbit. The reaction to this force, in the sense of Newton's third law, is:

A spring scale, calibrated in newtons, is used to weigh sugar. If it were possible to weigh sugar at the following locations, where will the buyer get the most sugar to a newton?

The magnitude of the acceleration of a planet in orbit around the Sun is proportional to:

Venus has a mass of about 0.0558 times the mass of Earth and a diameter of about 0.381 times the diameter of Earth. The acceleration of a body falling near the surface of Venus is about:

Suppose you have a pendulum clock which keeps correct time on Earth (acceleration due to gravity = 9.8 m/s2). Without changing the clock, you take it to the Moon (acceleration due to gravity = 1.6 m/s2). For every hour interval (on Earth) the Moon clock will record:

The orbit of a certain a satellite has a semimajor axis of 1.5 * 107 m and an eccentricity of 0.20. Its perigee (minimum distance) and apogee (maximum distance) are respectively:

In planetary motion the line from the star to the planet sweeps out equal areas in equal times. This is a direct consequence of:

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Suppose you have a pendulum clock which keeps correct time on Earth (acceleration due to gravity = 9.8 m/s²). Without changing the clock, you take it to the Moon (acceleration due to gravity = 1.6 m/s²). For every hour interval (on Earth) the Moon clock will record:

The orbit of a certain a satellite has a semimajor axis of 1.5 * 10⁷ m and an eccentricity of 0.20. Its perigee (minimum distance) and apogee (maximum distance) are respectively: