Physics
Gravitational force between two spheres is 30N. If the magnitude of each doubles, what is the force between the two
120N
A 560N woman stands on top of a very tall ladder so she is one earth radius above earths surface. How much does she weigh
140N
If the earth had twice it's present mass, but the same radius, what would be the value of g
19.6 m/s^2
How many tides are there normally each day on a typical ocean beach
2
Suppose the gravitational force between two massive spheres is 100N. If the distance between the sphere is doubled, what is the force between masses
25 N
Gravitational force between two spheres is 70N. If distance between spheres is halved, what is the force between masses
280N
Gravitational force is 70 between two masses. If one magnitude halves, what is the force between the two
35N
Since earth is attracted to the sun, why doesn't it fall into the sun
Because it has sufficient tangential velocity
What is the object that has an enourmous density and gravitational feild near it, alters the space around it, and has an escape speed greater than the speed of light
Black hole
A very massive object A and a less massive object B move toward each other under the influence of mutual gravitation. Which force is greater
Both forces are the same
If earths mass decreased to one half it's original mass with no change in radius, then your weight would
Decrease to one half your original weight
The value of the acceleration due to gravity
Depends on the gravitational constant, the mass and radius of earth, and is different on other planets
Earth tides in which the solid surface of earth rises and falls are caused by
Different forces between the moon and opposite parts of earth
A rock and pebble will fall with the same acceleration in a gravitational field because the gravitational force on each is
Different, but the ratio is the same
A lunar eclipse happens when
Earth is bee between the moon and sun
During an eclipse of the sun, when the moon comes between the sun and earth, the ocean tide nearest the moon would be
Extra high
Jupiter has more than 300 times the mass of earth. On jupiters surface an object weighs only 3 times as much. This explanation involves jupiters
High density
If the radius of earth decreased with no change in mass, your weight would
Increase
If the mass of earth increased, with no change in radius, your weight would
Increase also
Newton hypothesized that the moon
Is a projectile, is falling around earth, is actually attracted to earth
If you were to weigh yourself in an elevator that is accelerating upward, compared to your ordinary weight you would weigh
More
When a very massive space ship lands on a hollow planets surface, the gravitational field inside the planet is
Nonzero, directed toward the spaceship
There are two main processes going on in the sun that keep the sun in existence they are gravitation and
Nuclear fusion
Ocean tides occur mainly because
Of different gravitational pulls of the moon on opposite sides of earth
If you stood atop a ladder on earth that was as tall as earths radius(so you were twice as far from the earths center) your weight on the ladder would be
One quarter the normal value
If the sun were to collapse to form a black hole, earth would
Orbit the black hole just as it orbits the sun now
When a star collapses to form a black hole, it's mass
Remains the same
The force of gravity acting on you will increase if you
Stand on a planet with a radius that is shrinking
Newton had the insight that
The earth is moving
A solar eclipse happens when
The moon is between the earth and sun
A planet has half the mass of the Earth and half the radius. Compared to its weight on earth, and Apple on this planet would weigh
Twice as much
By noticing that Uranus orbit is perturbed and by using the law of gravitation, two astronomers independently discovered
Uranus has several moons
The gravitational field strength at the center of earth is
Zero
