The weight of spaceman Speff at the surface of planet X,solely due to its gravitational pull,is 389 N.If he moves to a distance of 1.86 × 104 km above the planet's surface,his weight changes to 24.31 N.What is the mass of planet X,if Speff's mass is 75.0 kg?

A) 2.99 × 1024 kg B) 2.99 × 1018 kg C) 2.99 × 1017 kg D) 1.59 × 1018 kg A) 2.99 × 1024 kg B) 2.99 × 1018 kg C) 2.99 × 1017 kg D) 1.59 × 1018 kg

Exam 13: Gravitation

Suppose we want a satellite to revolve around the earth 5 times a day.What should be the radius of its orbit? (The mass of the earth is , ,and you can neglect the presence of the moon.)

(Multiple Choice)

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Question 21

The moons of Mars,Phobos (Fear)and Deimos (Terror),are very close to the planet compared to Earth's Moon.Their orbital radii are 9,378 km and 23,459 km respectively.What is the ratio of the orbital speed of Phobos to that of Deimos?

(Multiple Choice)

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Question 22

A man-made satellite of mass 6105 kg is in orbit around the earth,making one revolution in 430 minutes.What is the magnitude of the gravitational force exerted on the satellite by the earth? (The mass of the earth is 6.0 × 10²⁴ kg and

(Short Answer)

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Question 23

Ekapluto is an unknown planet that has two moons in circular orbits.The table summarizes the hypothetical data about the moons. The orbital period of Moon B is closest to

(Multiple Choice)

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Question 24

A 910-kg object is released from rest at an altitude of 1200 km above the north pole of the earth.If we ignore atmospheric friction,with what speed does the object strike the surface of the earth? (G = 6.67 × 10^-11 N • m²/kg², ,the polar radius of the earth is 6357 km)

(Multiple Choice)

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Question 25

Two moons orbit a planet in nearly circular orbits.Moon A has orbital radius r,and moon B has orbital radius 4r.Moon A takes 20 days to complete one orbit.How long does it take moon B to complete an orbit?

(Multiple Choice)

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Question 26

If the mass of the earth and all objects on it were suddenly doubled,but the size remained the same,the acceleration due to gravity at the surface would become

(Multiple Choice)

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Question 27

An astronaut is standing on the surface of a planetary satellite that has a radius of 1.74 × 10⁶ m and a mass of 7.35 × 10²² kg.An experiment is planned where a projectile needs to be launched straight up from the surface.What must be the minimum initial speed of the projectile so it will reach a height of 2.55 × 10⁶ m above this satellite's surface?

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Question 28

A very small round ball is located near a large solid sphere of uniform density.The force that the large sphere exerts on the ball

(Multiple Choice)

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Question 29

Because the earth's orbit is slightly elliptical,the earth actually gets closer to the sun during part of the year.When the earth is closer to the sun its orbital speed is

(Multiple Choice)

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Question 30

Two planets having equal masses are in circular orbit around a star.Planet A has a smaller orbital radius than planet B.Which statement is true?

(Multiple Choice)

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Question 31

A satellite is in circular orbit at an altitude of 2300 km above the surface of a nonrotating asteroid with an orbital speed of 5.9 km/s.The minimum speed needed to escape from the surface of the asteroid is 14.6 km/s,and G = 6.67 × 10^-11 N • m²/kg².The mass of the asteroid is closest to

(Multiple Choice)

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Question 32

Spaceman Speff orbits spherical asteroid X with his spaceship.To remain in a circular orbit at from the asteroid's center,he should maintain a speed of What is the mass of planet X?

(Multiple Choice)

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Question 33

Planet Z-34 has a mass equal to 1/3 that of Earth,a radius equal to 1/3 that of Earth,and an axial spin rate 1/2 that of Earth.With g representing,as usual,the acceleration due to gravity on the surface of Earth,the acceleration due to gravity on the surface of Z-34 is

(Multiple Choice)

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Question 34

Neptune circles the Sun at a distance of 4.50 × 10¹² m once every 164 years.Saturn circles the Sun at a distance of 1.43 × 10¹² m.What is the orbital period of Saturn?

(Multiple Choice)

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Question 35

What is the period (in hours)of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 10²³ kg,its radius is ,and .

(Multiple Choice)

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Question 36

The radius of the earth is R.At what distance above the earth's surface will the acceleration of gravity be 4.9 m/s²?

(Multiple Choice)

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Question 37

The weight of spaceman Speff at the surface of planet X,solely due to its gravitational pull,is 389 N.If he moves to a distance of 1.86 × 10⁴ km above the planet's surface,his weight changes to 24.31 N.What is the mass of planet X,if Speff's mass is 75.0 kg?

(Multiple Choice)

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Question 38

A certain planet has an escape speed V.If another planet of the same size has twice the mass as the first planet,its escape speed will be

(Multiple Choice)

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Question 39

Jupiter completes one revolution about its own axis every 9.92 hours.What is the radius of the orbit required for a satellite to revolve about Jupiter with the same period? Jupiter has a mass of and G = 6.67 × 10^-11 N • m²/kg².

(Multiple Choice)

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Question 40

Showing 21 - 40 of 50

Exam 13: Gravitation

Suppose we want a satellite to revolve around the earth 5 times a day.What should be the radius of its orbit? (The mass of the earth is , ,and you can neglect the presence of the moon.)

The moons of Mars,Phobos (Fear)and Deimos (Terror),are very close to the planet compared to Earth's Moon.Their orbital radii are 9,378 km and 23,459 km respectively.What is the ratio of the orbital speed of Phobos to that of Deimos?

A man-made satellite of mass 6105 kg is in orbit around the earth,making one revolution in 430 minutes.What is the magnitude of the gravitational force exerted on the satellite by the earth? (The mass of the earth is 6.0 × 1024 kg and

Ekapluto is an unknown planet that has two moons in circular orbits.The table summarizes the hypothetical data about the moons. The orbital period of Moon B is closest to

A 910-kg object is released from rest at an altitude of 1200 km above the north pole of the earth.If we ignore atmospheric friction,with what speed does the object strike the surface of the earth? (G = 6.67 × 10-11 N • m2/kg2, ,the polar radius of the earth is 6357 km)

Two moons orbit a planet in nearly circular orbits.Moon A has orbital radius r,and moon B has orbital radius 4r.Moon A takes 20 days to complete one orbit.How long does it take moon B to complete an orbit?

If the mass of the earth and all objects on it were suddenly doubled,but the size remained the same,the acceleration due to gravity at the surface would become

A very small round ball is located near a large solid sphere of uniform density.The force that the large sphere exerts on the ball

Because the earth's orbit is slightly elliptical,the earth actually gets closer to the sun during part of the year.When the earth is closer to the sun its orbital speed is

Two planets having equal masses are in circular orbit around a star.Planet A has a smaller orbital radius than planet B.Which statement is true?

A satellite is in circular orbit at an altitude of 2300 km above the surface of a nonrotating asteroid with an orbital speed of 5.9 km/s.The minimum speed needed to escape from the surface of the asteroid is 14.6 km/s,and G = 6.67 × 10-11 N • m2/kg2.The mass of the asteroid is closest to

Spaceman Speff orbits spherical asteroid X with his spaceship.To remain in a circular orbit at from the asteroid's center,he should maintain a speed of What is the mass of planet X?

Planet Z-34 has a mass equal to 1/3 that of Earth,a radius equal to 1/3 that of Earth,and an axial spin rate 1/2 that of Earth.With g representing,as usual,the acceleration due to gravity on the surface of Earth,the acceleration due to gravity on the surface of Z-34 is

Neptune circles the Sun at a distance of 4.50 × 1012 m once every 164 years.Saturn circles the Sun at a distance of 1.43 × 1012 m.What is the orbital period of Saturn?

What is the period (in hours)of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 1023 kg,its radius is ,and .

The radius of the earth is R.At what distance above the earth's surface will the acceleration of gravity be 4.9 m/s2?

The weight of spaceman Speff at the surface of planet X,solely due to its gravitational pull,is 389 N.If he moves to a distance of 1.86 × 104 km above the planet's surface,his weight changes to 24.31 N.What is the mass of planet X,if Speff's mass is 75.0 kg?

A certain planet has an escape speed V.If another planet of the same size has twice the mass as the first planet,its escape speed will be

Jupiter completes one revolution about its own axis every 9.92 hours.What is the radius of the orbit required for a satellite to revolve about Jupiter with the same period? Jupiter has a mass of and G = 6.67 × 10-11 N • m2/kg2.

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A man-made satellite of mass 6105 kg is in orbit around the earth,making one revolution in 430 minutes.What is the magnitude of the gravitational force exerted on the satellite by the earth? (The mass of the earth is 6.0 × 10²⁴ kg and

A 910-kg object is released from rest at an altitude of 1200 km above the north pole of the earth.If we ignore atmospheric friction,with what speed does the object strike the surface of the earth? (G = 6.67 × 10^-11 N • m²/kg², ,the polar radius of the earth is 6357 km)

A satellite is in circular orbit at an altitude of 2300 km above the surface of a nonrotating asteroid with an orbital speed of 5.9 km/s.The minimum speed needed to escape from the surface of the asteroid is 14.6 km/s,and G = 6.67 × 10^-11 N • m²/kg².The mass of the asteroid is closest to

Neptune circles the Sun at a distance of 4.50 × 10¹² m once every 164 years.Saturn circles the Sun at a distance of 1.43 × 10¹² m.What is the orbital period of Saturn?

What is the period (in hours)of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 10²³ kg,its radius is ,and .

The radius of the earth is R.At what distance above the earth's surface will the acceleration of gravity be 4.9 m/s²?

The weight of spaceman Speff at the surface of planet X,solely due to its gravitational pull,is 389 N.If he moves to a distance of 1.86 × 10⁴ km above the planet's surface,his weight changes to 24.31 N.What is the mass of planet X,if Speff's mass is 75.0 kg?

Jupiter completes one revolution about its own axis every 9.92 hours.What is the radius of the orbit required for a satellite to revolve about Jupiter with the same period? Jupiter has a mass of and G = 6.67 × 10^-11 N • m²/kg².