Weight and Mass Problems
Authored by Cynthia García
Science
7th Grade
NGSS covered
Used 4+ times
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12 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
A dog has a mass of 15 kg. What is its weight on Earth?
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Answer explanation
Weight = Mass * Acceleration due to gravity.
Calculation: Weight = 15 kg * 9.81 m/s² = 147 N
Weight = Mass * Acceleration due to gravity.
Calculation: Weight = 15 kg * 9.81 m/s² = 147 N
Tags
NGSS.MS-PS2-4
2.
OPEN ENDED QUESTION
3 mins • 1 pt
A book has a weight of 2 N on Earth. What is its mass?
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Answer explanation
Mass = Weight / Acceleration due to gravity.
Calculation: Mass = 2 N / 9.81 m/s² ≈ 0.204 kg
Mass = Weight / Acceleration due to gravity.
Calculation: Mass = 2 N / 9.81 m/s² ≈ 0.204 kg
3.
OPEN ENDED QUESTION
3 mins • 1 pt
A person weighs 750 N on Earth. What would be their weight on Jupiter, where the acceleration due to gravity is about 24.9 m/s²?
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Answer explanation
Calculation: Weight = 750 N * (24.9 m/s² / 9.81 m/s²) ≈ 18,675 N
4.
OPEN ENDED QUESTION
3 mins • 1 pt
A brick has a weight of 50 N on the moon. What is its mass on Earth?
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Answer explanation
The mass of an object remains constant regardless of its location. So, if a brick has a weight of 50 N on the moon, its mass on Earth would also be 50 N.
However, we can calculate the mass using the formula:
Mass = Weight / Acceleration due to gravity
On the moon, the acceleration due to gravity is approximately 1.6 m/s². So:
Mass = 50 N / 1.6 m/s² ≈ 31.25 kg
Tags
NGSS.MS-PS2-4
5.
OPEN ENDED QUESTION
3 mins • 1 pt
A spacecraft orbits Venus, where the acceleration due to gravity is about 8.87 m/s². If an astronaut has a mass of 65 kg, what would their weight be on Venus?
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Answer explanation
the astronaut's mass remains constant, but their weight changes due to the different acceleration due to gravity on Venus.
Calculation: Weight = 65 kg * 8.87 m/s² ≈ 575.55 N
the astronaut's mass remains constant, but their weight changes due to the different acceleration due to gravity on Venus.
Calculation: Weight = 65 kg * 8.87 m/s² ≈ 575.55 N
Tags
NGSS.MS-PS2-4
6.
OPEN ENDED QUESTION
3 mins • 1 pt
A feather has a weight of 0.03 N on the moon. What is its mass?
The acceleration due to gravity on the moon is about 1.6 m/s².
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Answer explanation
Weight (W) = Mass (m) * Acceleration due to gravity (g)
Rearranging the formula to solve for mass:
Mass (m) = Weight (W) / Acceleration due to gravity (g)
Substituting the given values:
Mass (m) = 0.03 N / 1.6 m/s²
Calculating:
Mass (m) ≈ 0.01875 kg
Tags
NGSS.MS-PS2-4
7.
OPEN ENDED QUESTION
3 mins • 1 pt
A spacecraft orbits a planet. The spacecraft has a mass of 1000 kg and experiences a gravitational force of 5000 N. What is the acceleration due to gravity on this planet?
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Answer explanation
Solution:
Use the formula: Weight (W) = mass (m) * acceleration due to gravity (g)
Rearrange the formula to find g: g = W / m
Substitute the values: g = 5000 N / 1000 kg
Calculate and answer: g = 5 m/s²
Tags
NGSS.HS-PS2-1
NGSS.HS-PS2-4
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