Deriving Escape Velocity of Planet Earth

Interactive Video
•
Physics, Science, Other
•
11th Grade - University
•
Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the mass of Earth used in the escape velocity calculation?
5.97 x 10^24 kg
5.97 x 10^6 kg
6.37 x 10^6 kg
6.37 x 10^24 kg
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the escape velocity of a planet?
The speed needed to escape the planet's atmosphere
The minimum speed needed to break free from the planet's gravitational pull
The speed needed to orbit the planet
The speed needed to reach the planet's core
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why can't we use uniformly accelerated motion equations to solve for escape velocity?
Because they only apply to horizontal motion
Because the equations are too complex
Because the acceleration due to gravity decreases with distance
Because the acceleration due to gravity is constant
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the universal gravitational potential energy in this problem?
It is irrelevant to escape velocity
It is always negative and helps determine escape velocity
It is used to calculate the force of gravity
It is always positive
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens if an object is launched at a speed greater than the escape velocity?
It will stop at a certain distance
It will continue moving away with some kinetic energy
It will return to the planet
It will orbit the planet
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for escape velocity derived in the video?
v = sqrt(2GM/R)
v = GM/R
v = 2GM/R
v = sqrt(GM/2R)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the approximate escape velocity of Earth in miles per hour?
20,000 mph
15,000 mph
25,000 mph
30,000 mph
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