Newton's law of universal gravitation
Grade 11 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
A space probe feels a pull of 36 N from a planet. If its distance from the planet's center becomes 2 times as large, what pull does it feel, Ari?
A space probe feels a pull of 80 N from a planet. If its distance from the planet's center becomes 4 times as large, what pull does it feel, Bo?
A space probe feels a pull of 72 N from a planet. If its distance from the planet's center becomes 3 times as large, what pull does it feel, Esme?
Read this first
Use this
Orbit diagram (NASA fact sheets).
In the diagram, how do Earth's pull on the Moon and the Moon's pull on Earth compare, Jun?
- Earth's pull is bigger, since Earth has more mass
- Equal in size, opposite in direction
- The Moon's pull is bigger, since the Moon is smaller
In the diagram, which distance goes into F = Gm₁m₂ ÷ r², Kira?
Use the picture in question 4.
- The gap between their surfaces
- Earth's radius
- 384,400 km, center to center
In the diagram, which way does Earth's pull on the Moon point, Luz?
Use the picture in question 4.
- Away from Earth
- Along the Moon's path
- Toward Earth's center
Both masses double at the same distance. What happens to the gravitational force between them, Noah?
- It doubles
- It stays the same, since both changed
- It is 4 times as big
A 2 kg box and a 1 kg box sit near each other. Which pulls on the other harder by gravity, Pia?
- The 1 kg box pulls harder
- Neither: the pulls are equal
- The 2 kg box pulls harder
Why don't two boxes on a table visibly pull together, Tala?
- Their pull on each other is far too small to notice
- Gravity doesn't act between small objects
- The table blocks gravity
G = 6.674 × 10⁻¹¹ N·m²/kg². What does its tiny size tell you, Zee?
- Gravity between everyday masses is very weak
- G is the same as g
- Gravity is strong between small objects