Unit Test — Unit test Answers
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Which is a characteristic of centripetal acceleration?
A
It is directed outward from the center of a circle.B
It is directed inward, toward the center of a circle.C
It results in an object moving faster.D
It results in an object moving slower.22
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The image shows how Earth orbits the Sun. Points W and X are the same distance from the Sun.
A
Earth is speeding up at W and slowing down at X because the force on Earth is greater at W than at X.B
Earth is slowing down at W and speeding up at X because the force on Earth is greater at W than at X.C
The speed of Earth is the same at W as at X because the force on Earth is the same at W as at X.D
The speed of Earth is greater at W than at X because the force on Earth is greater at W than at X.23
Kepler’s first law states that the orbits of planets are ellipses with the Sun at one .
Answer not available
24
The mass of the Sun is 2 × 1030 kg, and the mass of Saturn is 5.68 × 1026 kg. The distance between Saturn and the Sun is 9.58 AU. Veronica is solving the following equation to calculate the orbital period of Saturn, but there is an error in the equation.T = What should Veronica change to correct the equation?
A
change the position of 2 x 1030 kg and 9.58 AUB
change 2 x 1030 kg to 5.68 x 1026 kgC
change the square root to a cube rootD
change 9.58 AU to the distance in meters25
In the equation for the gravitational force between two objects, which quantity must be squared?
A
m1B
m2C
GD
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