Astronomy Calcuations

Weight on Earth is the measure of the force gravity acting upon our mass. Each planet has a different amount of gravity. Which of the planets listed here would you weigh the MOST?

• Jupiter

• Mercury

• Uranus

• Neptune

It takes one year for the Earth to orbit the Sun. based on the data in the table, which PLANET has the SHORTEST year?

• Jupiter

• Mars

• Mercury

• Neptune

• Pluto

The two things that affect gravity are:

• The mass of two objects and their respective distance apart

• The size of two objects and their weights

• The distance between two objects and their respective weights

• The rotational and revolutional periods

Based on Newton's Universal Law of Gravitation, how would your mass and weight compare being on Venus relative to Earth?

Earth Gravity = 9.8 m/s²

Venus Gravity = 8.9 m/s²

• Both mass and weight would be less on Venus

• Your mass would be the same but you would weigh slightly less on Venus

• Both mass and weight would be more on Venus

• Your mass would be less but your weight would be the same on Venus

According to the Universal Law of Gravitation, which variable has the greatest affect on Fg?

• Mass of object 1

• Mass of object 2

• Distance (r, stands for radius) between the two masses

• The larger the object the greater its Fg

Which of the following has the shortest orbital period?

• Asteroid belt

• Jupiter

• Saturn

• Uranus

• Neptune

Which of the following would have the greatest Escape Velocity necessary to leave it?

• Earth

• Earth's Moon

• Saturn

• Neptune

Based on the information of MARS: It's radius is ______ and its circumference is ______ (miles).
 $C=\ 2\pi r$  

• 2108 miles; about 13,200 miles 

• 4216 miles; about 26,500 miles 

• 1054 miles; about 6,600 miles 

• Cannot be determines (not enough info) 

Find the RPS (Rotations Per Second) of Jupiter if it makes 1 rotation in 9 hours and 50 minutes.

• 2.8 x 10^-5

• 2.4 x 10^-4

• 1.8 x 10^-5

• 5.6 x 10^-6

Jupiter has a diameter of 143,000 km. It rotates every 9 hours and 50 minutes. Approximately, what is its rotational linear speed in meters per second (m/s)?

• 12,600 m/s 

• 14,200 m/s 

• 11,700 m/s 

• 9,900 m/s