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- 1. Multiple Choice
Two satellites of equal mass are in circular orbit around a planet. Satellite b is twice as far out. Which feels a stronger gravitational force?
Satellite a
Satellite b
Both the same
- 2. Multiple Choice
Two satellites of equal mass are in circular orbit around a planet. Satellite b is twice as far out. How much stronger is the planet’s gravity on satellite a (compared to satellite b)?
2× as much
3× as much
4× as much
5× as much
- 3. Multiple Choice
The space shuttle is orbiting the Earth clockwise. Which vector shows the direction of the gravitational force acting on the shuttle?
a
b
c
d
- 4. Multiple Choice
Why do astronauts in this space shuttle feel weightless?
They are in free fall, at the same rate as the shuttle
There is an equal force pulling them away from Earth
The gravity at that distance is too small to feel
They pull on Earth as hard as it pulls on them
- 5. Multiple Choice
Which diagram best shows the gravitational interaction between Earth and a satellite?
- 6. Multiple Choice
If you could go to the center of the Earth, how would your weight change?
increase a lot
increase slightly
stay the same
decrease slightly
become zero
- 7. Multiple Choice
You want to launch a satellite into Earth orbit. You already know Earth’s mass, and the satellite’s mass. What additional information do you need to calculate the gravitational force that will act on it?
The height it will have
The acceleration of gravity at the surface
Earth's distance from the Sun
The satellite's size
- 8. Multiple ChoiceWhat are the factors which combine to to keep celestial bodies in orbit?Air Resistance and GravityGravity and InertiaInertia and orbital speedOrbital speed and gravity
- 9. Multiple ChoiceWhat did Kepler discover about planets and their orbital speed?Planets closest to the Sun will orbit with the fastest orbital speed.Planets with the greatest mass will orbit the Sun with the fastest orbital speed.Planets furthest from the Sun will orbit with the fastest orbital speed.Planets with the least mass will orbit the Sun with the fastest orbital speed.
- 10. Multiple Choice
Earth (mearth = 5.97x1024kg) orbits the sun (msun=1.99x1030kg) at a mean distance of 1.50 x 1011kg. What is the gravitational force of the Sun on the Earth? (G=6.67x10-11Nm2kg-2)
5.29 x 1032N
3.52 x 1022N
5.90 x 10-2N
1.77 x 10-8
- 11. Multiple ChoiceGeostationary satellites are positioned:Over the equatorUnder the equatorThe North PoleThe South Pole
- 12. Multiple ChoiceIn simplest terms, what does Kepler's 3rd law state?planets take a long time to orbit the sunthere is no relationship between the distance of planet from the sun and the time it takes to orbit the sunthere is a mathematical relationship between the distance of a planet from the sun and the time it takes to orbit the sunevery planet has the same orbital period
- 13. Multiple ChoiceWhat states that "every object in the universe attracts every other object"?Law of Universal GravitationNewton's First Law of MotionMy motherInertia & gravity
- 14. Multiple ChoiceWhich of the following is Newton's Law on Gravitation?F=Gm1m2/rF = Gm1m2/r2F = Gm1m2/2rF = m1m2/2r
- 15. Multiple ChoiceForce of gravity is directly proportional toMassWeightDistanceTime
- Answer choicesTagsAnswer choicesTags