Gravity and Orbits

If the Space Shuttle orbits the Earth at an altitude of 380 km, what is the gravitational field strength due to the Earth?

Remember: the mass of the Earth is approximately 5.98*10²⁴ kg and the radius is about 6370 km.

• 8.76 m/s²

• 9.81 m/s²

• 9.83 m/s²

• 2763 m/s²

Tags

NGSS.HS-PS2-4

g stands for acceleration due to gravity, but it also can stand for

• Gravitational force of attraction

• Weight

• Gravitational field strength

• Universal gravitation constant

Tags

NGSS.HS-PS2-4

What is the gravitational force of attraction between two asteroids in space, each with a mass of 50,000 kg, separated by a distance of 3800 m?

• 1.2 * 10^-8 N

• 1.2 * 10^-8 kg

• 2.4 * 10^-8 N

• 3.6 * 10^-8 kg

Tags

NGSS.HS-PS2-4

F_g stands for weight (mg) but it also stands for

• Acceleration due to gravity

• Universal gravitation constant

• Gravitational field strength

• Gravitational force of attraction

Tags

NGSS.HS-PS2-4

Astronauts are weightless on the Space Station

• True

• False

Planets have a(n) __________ motion

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NGSS.HS-ESS1-4

You are seated in your physics class next to another student 0.60 m away. Estimate the magnitude of the gravitational force between you. Assume that you each have a mass of 65 kg.

• 7.8 * 10^-7 N

• 4.7 * 10^-7 N

• 1.2 * 10^-8 N

• 7.2 * 10^-9 N

Tags

NGSS.HS-PS2-4

Who created the laws of planetary motion?

• Sir Isaac Newton

• Johannes Kepler

• Stephen Hawking

• Albert Einstein

How do orbits relate to uniform circular motion?

• They don't

• Centripetal force

• Centripetal acceleration

• Both centripetal force AND centripetal acceleration

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

On a scale of 1-5, 5 being very ready and 1 being extremely unprepared, how ready are you for tomorrow's test?

• 1

• 2

• 3

• 4

• 5