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Universal Gravitation. Newton hypothesized that the moon: is a projectile is actually attracted to Earth is falling around Earth has tangential velocity that prevents it from falling into earth all of the above. Universal Gravitation.

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universal gravitation
Universal Gravitation
  • Newton hypothesized that the moon:
    • is a projectile
    • is actually attracted to Earth
    • is falling around Earth
    • has tangential velocity that prevents it from falling into earth
    • all of the above
universal gravitation1
Universal Gravitation
  • If the radius of Earth decreased, with no change in mass, your weight would:
    • increase
    • not change
    • decrease
universal gravitation2
Universal Gravitation
  • A very massive object A and a less massive object B move toward each other under the influence of mutual gravitation. Which force, if either, is greater?
    • the force on A
    • the force on B
    • both forces are the same
universal gravitation3
Universal Gravitation
  • A very massive object A and a less massive object B move toward each other under the influence of mutual gravitation. Which object will accelerate more?
    • object A
    • object B
    • both objects accelerate the same
universal gravitation4
Universal Gravitation
  • The force of gravity on you is greatest when you are standing:
    • above the earth’s surface
    • at the center of the earth
    • on the earth’s surface
universal gravitation5
Universal Gravitation
  • Consider the gravitational force between the earth and a meteor in outer space. If the meteor moves so its distance from the earth’s center doubles, the gravitational force on the meteor will be:
    • one quarter
    • half
    • double
    • quadruple
universal gravitation6
Universal Gravitation
  • Why did Newton think there was a force acting on the moon?
    • because the moon always keeps one side toward Earth
    • because the moon moves in a curved path
    • because there is no air on the moon
    • because the moon is moving
    • all of the above
universal gravitation7
Universal Gravitation
  • Suppose the gravitational force between two masses is 10 newtons. If the volume of each mass doubles, while everything else stays the same, what is the force between the masses?
    • 40 N
    • 20 N
    • 10 N
    • 5 N
    • 2.5 N
universal gravitation8
Universal Gravitation
  • The force of attraction between two masses depends inversely on the square of the distance between them. Any law that follows this relationship is called an inverse square law.
    • true
    • false
universal gravitation9
Universal Gravitation
  • Because Earth is “falling” around the sun, it will eventually crash into it.
    • true
    • false
gravitational interactions
Gravitational Interactions
  • The value of the acceleration due to gravity:
    • depends on the radius of Earth
    • depends on the mass of Earth
    • depends on the universal gravitational constant
    • is different on different planets
    • all of the above
gravitational interactions1
Gravitational Interactions
  • Gravitational field lines show the:
    • direction a mass would be accelerated
    • direction of the field
    • direction of the force on any mass
    • strength of the field
    • all of the above
gravitational interactions2
Gravitational Interactions
  • The acceleration due to gravity at the center of the earth is:
    • large
    • the same as on the surface
    • slightly less than on the surface
    • zero
gravitational interactions3
Gravitational Interactions
  • If you were to weigh yourself in an elevator that is accelerating upward, compared to your ordinary weight you would weigh:
    • more
    • the same
    • less, but more than zero
    • zero
gravitational interactions4
Gravitational Interactions
  • The affect of the sun’s pull on the earth’s oceans is much less visible that that of the moon’s pull because:
    • Earth is orbiting so fast
    • Earth is rotating so fast
    • the sun is so far away
    • the sun is radiating a lot of energy
    • none of the above
gravitational interactions5
Gravitational Interactions
  • A lunar eclipse occurs when:
    • the sun is between Earth and the moon
    • the moon is between Earth and the sun
    • Earth is between the moon and the sun
gravitational interactions6
Gravitational Interactions
  • When a star collapses to form a black hole, its mass:
    • undergoes an enormous increase
    • decreases
    • remains the same
gravitational interactions7
Gravitational Interactions
  • The factor most directly responsible for making a black hole invisible is:
    • size
    • mass
    • color
    • not even light can escape
    • none of the above
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