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Calculate the force of gravity on a 6 kg mass at Earth's surface. The mass of Earth is 6.0 1024 kg, and its radius is 6.4 106 m.
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Calculate the force of gravity on a 29 kg mass if it were 6.4 106 m above Earth's surface (that is, if it were 2 Earth radii from Earth's center.)
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Calculate the force of gravity between Earth (mass = 6.0 1024 kg) and the moon (mass = 7.4 1022 kg). The average Earth-moon distance is 3.8 108 m.
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Calculate the force of gravity between Earth and the sun (sun's mass = 2.0 1030 kg; average Earth-sun distance = 1.5 1011 m).
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Calculate the force of gravity between a human adult (mass = 72 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its position closest to Earth (distance = 8.0 1010 m).
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Calculate the force of gravity between a newborn baby of mass 4 kg and the obstetrician of mass 75 kg, who is 0.1 m from the baby.
Which exerts more gravitational force on the baby, Mars or the obstetrician? Do both?
By how much?
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What is the magnitude and direction of the gravitational force that acts on a woman who weighs 500 N at the surface of Earth? In which direction?
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The weight of an apple near the surface of Earth is 1 N. What is the weight of Earth in the gravitational field of the apple?
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By what factor would your weight change if the Earth's diameter were also quadrupled and its mass were tripled?
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If you stood atop a ladder that was so tall that you double your distance from Earth's center, how would your weight compare with its present value?
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Many people mistakenly believe that the astronauts that orbit Earth are "above gravity." Calculate g for space shuttle territory 220 km above Earth's surface. Assume Earth's mass is 6.0 1024 kg, and its radius is 6.38 106 m (6380 km). Your answer is what percentage of 9.8 m/s2?
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Calculate the force of gravity on a 29 kg mass if it were 6.4 106 m above Earth's surface (that is, if it were 2 Earth radii from Earth's center.)
________________________________
Calculate the force of gravity between Earth (mass = 6.0 1024 kg) and the moon (mass = 7.4 1022 kg). The average Earth-moon distance is 3.8 108 m.
________________________________
Calculate the force of gravity between Earth and the sun (sun's mass = 2.0 1030 kg; average Earth-sun distance = 1.5 1011 m).
________________________________
Calculate the force of gravity between a human adult (mass = 72 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its position closest to Earth (distance = 8.0 1010 m).
________________________________
Calculate the force of gravity between a newborn baby of mass 4 kg and the obstetrician of mass 75 kg, who is 0.1 m from the baby.
Which exerts more gravitational force on the baby, Mars or the obstetrician? Do both?
By how much?
________________________________
What is the magnitude and direction of the gravitational force that acts on a woman who weighs 500 N at the surface of Earth? In which direction?
________________________________
The weight of an apple near the surface of Earth is 1 N. What is the weight of Earth in the gravitational field of the apple?
________________________________
By what factor would your weight change if the Earth's diameter were also quadrupled and its mass were tripled?
________________________________
If you stood atop a ladder that was so tall that you double your distance from Earth's center, how would your weight compare with its present value?
________________________________
Many people mistakenly believe that the astronauts that orbit Earth are "above gravity." Calculate g for space shuttle territory 220 km above Earth's surface. Assume Earth's mass is 6.0 1024 kg, and its radius is 6.38 106 m (6380 km). Your answer is what percentage of 9.8 m/s2?