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Planetary Weight Calculation Worksheet
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Planetary Weight Calculation Worksheet
A space crew is comparing how gravity affects weight on different planets. Use the gravity factors below. To estimate a person's weight on another planet, multiply their Earth weight by that planet's factor. Keep mass and weight distinct: mass is the amount of matter in an object, while weight is the force of gravity on it. Round decimal answers to the nearest tenth when needed.
Planet
Gravity factor
Mercury
0.38
Venus
0.91
Earth
1.00
Mars
0.38
Jupiter
2.36
Saturn
0.92
Uranus
0.89
Neptune
1.13
Plan the crew’s gravity test
Use the factor chart for Questions 1–10. The crew’s test astronaut, Riley, weighs 120 pounds on Earth.
1.Which force keeps planets moving in orbit around the Sun?
- The Sun's gravitational pull
- The planets' magnetic fields
- Friction from space dust
- The force of sunlight pushing them
2.Riley travels from Earth to Mars. What happens to Riley's mass, and what happens to Riley's weight?
3.Which calculation estimates Riley's weight on Jupiter?
- 120 + 2.36
- 120 × 2.36
- 120 ÷ 2.36
- 2.36 − 120
4.Calculate Riley's weight on Mars. Show the multiplication: 120 lb × 0.38.
5.Calculate Riley's weight on Jupiter using the factor 2.36. Include the unit.
6.On which planet would Riley weigh less: Venus or Saturn? Calculate both weights to support your answer.
7.Mercury and Mars have the same gravity factor in the chart. What would Riley weigh on each, and why are the answers the same?
8.A crew member says, “Riley's mass will be more than twice as large on Jupiter as on Earth.” Is the claim correct? Explain using the gravity factor.
9.Riley weighs 120 lb on Earth. Without doing exact multiplication, predict whether Riley would weigh more or less than 120 lb on Neptune. Then calculate the estimate using the factor 1.13.
10.A cargo case weighs 50 lb on Earth. Estimate its weight on Jupiter, where the factor is 2.36. Why might the crew need to plan carefully when moving it there?
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