Mass vs Weight Practice Questions
Answer the following questions using the formula below
Weight = mass x
gravity
Mass = weight ÷
gravity
Gravity = weight ÷
mass
1. Find the weight of a 60 kg astronaut on earth
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2. A physical science test book has a mass of 2.2 kg What is the weight on the Earth?
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3. A physical science test book has a mass of 2.2 kg a. What is the weight on Mars? (g =
3.7 N/kg )
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4. Hafthor Bjornson broke the deadlift record in April 2020, lifting 501 kg. How much
weight (in N) did he lift?
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5. The weight of a pony standing still on Earth is 1,025 N. What is the pony’s mass?
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6. Calculate the weight of the following objects on Earth: (gravity = 9.8N/kg)
a. A suitcase of mass 22 kg
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b. A car of mass 1110 kg
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c. A pencil case of mass 0.3 kg
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d. A bag, of mass 1.2 kg, containing 5 books, each of 0.5kg
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7. Calculate the mass of the following objects (the weight as measure on Earth is given):
a. A girl with a weight of 490 N
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b. A bag of sugar with a weight of 9.81 N
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8. Complete the following table:
Weight, W
Girl on a scooter
Moped and rider
1800 N
g on surface of
28 N
Mass, m
Gravitational
Field Strength, g
60 kg
9.81 N/kg
9.81 N/kg
100 kg
Ceres (Dwarf
planet)
Airbus A380
(maximum takeoff weight)
5500 N
9.81 N/kg
9. An astronaut, with her space-suit, has a mass of 80 kg. The gravitational field strength
on the Moon is 1.6N/kg
a. Calculate the astronaut’s weight on the Moon.
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b. State what happens to the astronaut’s mass on the Moon.
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c. The astronaut travels to Mars where her weight becomes 296 N. Calculate the
gravitational field strength on the surface of Mars.
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