Chapter 4 Flashcards
What do the three black arrows along the equator going east represent?
The moon’s gravitational force at different points on Earth
Where is it high tide?
West and East arrows of moon’s gravitational force
Where is it low tide?
North and South, not direct points of moon’s gravitational force
How should tidal bulges be drawn?
They should be much smaller compared to Earth
A car is accelerating when it is
going around a circular track at a steady 100 miles per hour
Compared to their values on Earth, on another planet your
mass would be the same but your weight would be different
Which person is weightless?
A child in the air as she plays on a trampoline.
To make a rocket turn left, you need to:
fire an engine that shoots out gas to the right
Compared to its angular momentum when it is farthest from the Sun, Earth’s angular momentum when it is nearest to the Sun is
the same
The gravitational potential energy of a contracting interstellar cloud
gradually transforms into other forms of energy.
If Earth were twice as far from the Sun, the force of gravity attracting Earth to the Sun would be
one-quarter as strong
According to the law of universal gravitation, what would happen to Earth if the Sun were somehow replaced by a black hole of the same mass?
orbit would not change
If the Moon were closer to Earth, high tides would
be higher then they are now
Consider the statement “There’s no gravity in space.” This statement is:
false
Orbital Period: A planet with twice Earth’s mass orbiting at a distance of 1 AU from a star with the same mass as the Sun
1 year
