Calculations
Suppose a baseball is 1kg, what would be the gravitational force between two baseballs 1 meter apart?
6.67x10-11
A concentration of mass that results from gravitational collapse, near which gravity is so intense that not even light can escape.
What is a black hole?
The Moon is much smaller than the Sun. Why does the Moon have a greater effect on Earth’s tides?
It is closer to the earth. Which lets the gravity have a more concentrated effect on different parts of the world.
The scientist who formulated the Universal Law of Gravitation.
Sir Isaac Newton
If the earth was hollow and you were in the same location but all the mass of the earth was distributed across crust, How would your weight be effected?
You'd weight less because your distance from most of the mass would be further.
Suppose Xavier and Eli are standing 0.5 meters apart, they are 100 kg and 125 kg. What force does Xavier experience of gravity from Eli?
what is .000001668?
Being without a support force, as in free fall.
What is Weightless?
If Earth’s mass stayed the same but its radius became smaller, what would happen to gravity at its surface?
What is the gravitational force would increase.
Why is a black hole invisible to the eye?
The moon is less massive and thus experiences more acceleration than the earth.
If the gravitational force between two objects is 10 N and the distance is doubled, what is the new force?
what is 2.5N?
This notation is used to help express really big or small numbers without having to write all the zeros.
What is scientific notation?
Why astronauts feel weightless even though gravity is acting on them.
What is because they are in continuous free fall?
If you were in a car that drove off the edge of a cliff why would you be momentarily weightless?
The ground underneath you, aka the car would also be falling and you would have no support force.
Suppose going into a mineshaft increased weight, what would that say about the distribution of the density of the earth?
That the earth becomes more dense as you go towards the center because the mass above must not be pulling as hard as the mass below you.
What is the Universal Gravitation?
Which affects gravity more: mass or distance?
Why does a scale change when you bounce on it?
The scale doesn't solely measure the force of gravity but the amount of force applied to it. When you bounce you are applying extra force to the scale.
If the Sun were replaced by a black hole with the same mass, what would happen to Earth’s orbit?
It would stay nearly the same.
IF the mass of the earth is 6.0x 1024 and the mass of the mars is 6.4 x1023 and the distance between the planets is 5.6 x1010. What is the gravitational force?
4.57 x 1027
The force that an object exerts on a supporting surface, which is often but not always due to the force of gravity.
What is weight?
If the distance between two objects is doubled, the gravitational force becomes this fraction of the original.
Which would produce the largest micro tides in your body?
The moon, because the earth effects your body almost equally because the distance isn't that far. The Sun is too far away to have a strong effect.
Explain why gravity is considered a universal force.
Because it effects nearly everything.