Universal Gravitation

Universal GravitationNewton hypothesized that the moon:is a projectileis actually attracted to Earthis falling around Earthhas tangential velocity that prevents it from falling into earthall of the above

Universal GravitationIf the radius of Earth decreased, with no change in mass, your weight would:increasenot changedecrease

Universal GravitationA 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 Athe force on Bboth forces are the same

Universal GravitationA 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 Aobject Bboth objects accelerate the sameUniversal GravitationThe force of gravity on you is greatest when you are standing:above the earths surfaceat the center of the earthon the earths surfaceUniversal GravitationConsider the gravitational force between the earth and a meteor in outer space. If the meteor moves so its distance from the earths center doubles, the gravitational force on the meteor will be:one quarterhalfdoublequadruple

Universal GravitationWhy did Newton think there was a force acting on the moon?because the moon always keeps one side toward Earthbecause the moon moves in a curved pathbecause there is no air on the moonbecause the moon is movingall of the aboveUniversal GravitationSuppose 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 N20 N10 N5 N2.5 N

Universal GravitationThe 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.truefalseUniversal GravitationBecause Earth is falling around the sun, it will eventually crash into it.truefalse

Gravitational InteractionsThe value of the acceleration due to gravity:depends on the radius of Earthdepends on the mass of Earthdepends on the universal gravitational constantis different on different planetsall of the aboveGravitational InteractionsGravitational field lines show the:direction a mass would be accelerateddirection of the fielddirection of the force on any massstrength of the fieldall of the aboveGravitational InteractionsThe acceleration due to gravity at the center of the earth is:largethe same as on the surfaceslightly less than on the surfacezeroGravitational InteractionsIf you were to weigh yourself in an elevator that is accelerating upward, compared to your ordinary weight you would weigh:morethe sameless, but more than zerozeroGravitational InteractionsThe affect of the suns pull on the earths oceans is much less visible that that of the moons pull because:Earth is orbiting so fastEarth is rotating so fastthe sun is so far awaythe sun is radiating a lot of energynone of the aboveGravitational InteractionsA lunar eclipse occurs when:the sun is between Earth and the moonthe moon is between Earth and the sunEarth is between the moon and the sunGravitational InteractionsWhen a star collapses to form a black hole, its mass:undergoes an enormous increasedecreasesremains the sameGravitational InteractionsThe factor most directly responsible for making a black hole invisible is:sizemasscolornot even light can escapenone of the above