Physics Chapter 5

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Seattle Central College *

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100

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Physics

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Jan 9, 2024

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pdf

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Uploaded by ProfOyster2999

Name: Score: 20 Multiple choice questions Term A planet has half the mass of the Earth and half the radius. Compared to its weight on Earth, an apple on this planet would weigh _____. one-fourth as much half as much twice as much the same zero 1 of 20 Term If Earth's mass decreased to one half its original mass, with no change in radius, then your weight would _____. stay the same decrease to one half your original weight decrease to one quarter your original weight none of the above 2 of 20 Term If Earth were its present size but twice as massive, we would weigh less. True False 3 of 20

Term Suppose the gravitational force between two spheres is 30 N. If the magnitude of each mass doubles, what is the force between the masses? 120 N 60 N 8 N 15 N 30 N 4 of 20 Term A person weighs less at the equator than at the poles. The reason for this has to do with the tidal bulges. influence of the sun, moon, and all the planets. higher temperature at the equator, and expansion of matter. spin of the Earth. none of the above 5 of 20 Term A 2.0-kg ball is moving with a constant speed of 5.0 m/s in a horizontal circle whose radius is 0.5 m. What is the magnitude of the net force on the ball? 20 N 50 N 40 N 0 N 100 N 6 of 20

Term When an object moves in uniform circular motion, the direction of its acceleration is is directed toward the center of its circular path. in the opposite direction of its velocity vector. in the same direction as its velocity vector. depends on the speed of the object. is directed away from the center of its circular path. 7 of 20 Term A car goes around a circular curve on a horizontal road at constant speed. What is the direction of the friction force on the car due to the road? tangent to the curve in the forward direction perpendicular to the curve inward tangent to the curve opposite to the direction of the car's motion perpendicular to the curve outward There is no friction on the car because its speed is constant. 8 of 20 Term Jupiter has more than 300 times the mass of Earth. Yet on Jupiter's surface an object weighs only about 3 times as much as it would on Earth. The explanation to this involves Jupiter's _____. large radius high density greater distance from the sun 9 of 20

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Term The force of gravity does work on a satellite when it is in _____. a. circular orbit b. elliptical orbit c. both A and B d. neither A nor B 10 of 20 Term The reason the moon does not fall into Earth is that _____. Earth's gravitational field at the moon is weak the moon has a sufficiently large orbital speed gravitational pull of other planets keeps the moon up the moon has less mass than Earth none of the above 11 of 20 Term 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 B Both forces are the same. The force on A 12 of 20

Term The force of gravity on you is greatest when you are standing _____. on Earth's surface just above Earth's surface far above Earth's surface 13 of 20 Term Because Earth is "falling" around the sun, it will eventually crash into it. True False 14 of 20 Term Suppose the gravitational force between two spheres is 70 N. If the distance between the spheres is halved, what is the force between the masses? 70 N 35 N 280 N 140 N 17.5 N 15 of 20 Term When you whirl a can on the end of a string, the centripetal force on the can is actually the pull of the string on the can. True False 16 of 20

Term An object is placed exactly halfway between Earth and the moon. The object will fall toward _____. the moon neither Earth nor the moon Earth 17 of 20 Term Which is greater, the gravitational force between Earth and the moon, or the force between Earth and the sun? Earth-sun Earth-moon equal 18 of 20 Term A 1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose radius is 0.10 km. What is the magnitude of the friction force required to keep the car from sliding? 900 N 300 N 9800 N 3000 N 9000 N 19 of 20

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Privacy Terms Term Where does a satellite in a circular orbit have the greatest kinetic energy? At the point farthest from the planet Exactly at the point halfway to the planet At the point closest to the planet Anywhere — its kinetic energy is constant More information is needed 20 of 20 English (USA)

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