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Physics
10th -
12thgrade
Physics - Circular Motion and Gravitation
49 questions
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- 1. Multiple ChoiceCentripetal acceleration always pointsin the direction of the object's motionin the opposite direction of the object's motiontowards the center of the circletowards the outside of the circle
- 2. Multiple ChoiceBruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?0.25 ms-20.5 ms-21 ms-22 ms-2
- 3. Multiple ChoicePeriod (T) is measured in cycles per secondTrueFalse
- 4. Multiple ChoiceWhat is the force that causes centripetal acceleration when a car goes around a curve?FrictionGravityNormalTension
- 5. Multiple ChoiceAt the top of a roller-coaster loop, gravity and the normal force point in opposite directions.TrueFalse
- 6. Multiple ChoiceWho created the Universal Law of Gravitation?CopernicusNewtonKeplerGalileo
- 7. Multiple ChoiceAny object with mass is surrounded by a gravitational field.TrueFalseInconceivableStar Wars!
- 8. Multiple ChoiceThe gravitational force between two bodies is proportional to the product of their masses, and inversely proportional to the cube of the distance between themTrueFalseWhateverPossibly...
- 9. Multiple ChoiceFriction acts in a direction_______ to the direction of an object's motion.unrelatedequaloppositeperpendicular
- 10. Multiple ChoiceIf you went to the moon, would your weight change?YesNoMaybe
- 11. Multiple ChoiceA particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?ABCD
- 12. Multiple ChoiceWhat is the unit of measurement for weightGrams (g)Newtons (N)Pounds (lbs)Kilograms (Kg)
- 13. Multiple ChoiceHow are mass and weight different?Mass is the amount of matter in an object;Weight is the amount of gravitational force acting on the objectMass is the amount of gravitational force acting on an object;Weight is the amount of matter in an objectMass is a thing;Weight is a placeMass is an animal;weight is a human
- 14. Multiple Choicewhat happens to gravity as distance increases?there was never any gravity in spaceit in increases rapidlyIt decreases rapidlyIt does not change
- 15. Multiple Choicedoes mass or weight change on an object in spaceOnly weightonly heightNone of the aboveboth of them
- 16. Multiple ChoiceWhat is the value of g on Earth?9.81 m/s^29.81 N9.81 m9.81 s/m^2
- 17. Multiple ChoiceTwo factors effecting the magnitude of the force of gravity between 2 objects are...mass and distancemass and matterdistance and weightweight and mass
- 18. Multiple ChoiceAs distance between two objects increase the pull of gravityIncreasesDecreasesStays the same
- 19. Multiple ChoiceAs the product of two objects' masses increases, the pull of gravityIncreasesDecreasesStays the same
- 20. Multiple ChoiceDouble the distance between two objects4 times greater gravity attraction4 times weaker gravity attraction2 times weaker gravity2 times greater gravity
- 21. Multiple ChoiceDouble the product of the masses of two objects4 times stronger gravity force4 times weaker gravity force2 times weaker gravity force2 times stronger gravity force
- 22. Multiple ChoiceIf the force of gravity has been reduced by 1/4 which could be true?Mass was increased 4 timesMass was decreased 2 timesDistance was increased 4 timesDistance was doubled
- 23. Multiple ChoiceHow can you explain that we have a stronger gravitational attraction with Earth than the Sun?The sun has a larger massThe sun has a smaller massCloser to center of sunCloser to center of Earth
- 24. Multiple ChoiceIf Earth's mass was cut in half, what would happen to your mass?increase because gravitational force increasesdecrease because gravitational force decreasesdecrease because gravitational force increasesnothing, mass is not affected by gravitational force
- 25. Multiple ChoiceWhat would happen to your weight if Earth's mass was cut in half?increase because gravitational force increasesdecrease because gravitational force decreasesdecrease because gravitational force increasesincrease because gravitational force decreases
- 26. Multiple ChoiceThe force of gravity on Jupiter is a little more than 2 times the gravitational force on Earth. If an object has a mass of 50 kg and a weight of 490 N on Earth, what would be the object's approximate mass and weight on Jupiter?50 kg and 490 N100 kg and 490 N50 kg and 980 N100 kg and 980 N
- 27. Multiple ChoiceWhich of the following will not change in different gravitational fields?wieghtforcemasspounds
- 28. Multiple ChoiceA measure of the amount of matter in an objectmassweightgravitypounds
- 29. Multiple ChoicePlanets orbit the Sun in a shape called a(n)circleellipsefocusperihelion
- 30. Multiple ChoiceAn ellipse is drawn around two points calledaphelionperihelionfociaxis
- 31. Multiple ChoiceWhen a planet orbits the Sun, one of the foci of the elliptical orbit isthe axisthe perihelionthe centerthe Sun
- 32. Multiple ChoiceA planet moves fastest during its orbit around the Sun at the whenit is closest to the sun and gravity has a stronger pullit is farthest from the sun and gravity has a stronger pullit is closest to the sun and gravity has a weak pullit is farthest from the sun and gravity has a weak pull
- 33. Multiple ChoiceWhere is the planet moving fasterPosition A to BPosition B to CPosition H to IPosition I to J
- 34. Multiple ChoiceWhat is true about the area between points A, B and the Sun, and the area between points H, I and the Sun?The area between A, B and the Sun is the largest.The area between H, I and the Sun is the largestBoth areas are equal in sizeThere is not enough information to determine the areas
- 35. Multiple ChoiceThe ratio of a planets average distance from the sun and its orbital period isvery different for every planetabout the same for each planetlarge when the planet is farther awaynot related
- 36. Multiple ChoiceKepler's 2nd Law deals withthe shape of the planets' orbitsthe speed/area the planet travelsthe length of time it takes the planet to orbit the sun
- 37. Multiple ChoiceKepler's first law states that the orbits of the planets are oval in shape orellipsesperfect circles
- 38. Multiple ChoiceThe planet with the shortest year isEarthNeptunePlutoMercury
- 39. Multiple ChoiceOn a merry-go-round a person standing further from the center will experience _______ .a greater tangential velocitya greater centripetal accelerationA greater centripetal acceleration and a greater tangential velocitytangential velocity and centripetal acceleration stay the same
- 40. Multiple ChoiceWhat is the direction of the velocity at point B, if the ball is revolving clockwise?uprightdownleft
- 41. Multiple ChoiceWhat is the direction of the velocity at point A, if the ball is revolving clockwise?uprightdownleft
- 42. Multiple ChoiceWhat is the direction of the acceleration at point A, if the ball is revolving clockwise?uprightdownleft
- 43. Multiple ChoiceWhat is the direction of the acceleration at point B, if the ball is revolving clockwise?uprightdownleft
- 44. Multiple ChoiceIf the centripetal force is the only force acting on the ball and it disappears at point B, what direction would the ball travel, if the ball is revolving clockwise?45° down from rightrightdownleft
- 45. Multiple ChoiceCentrifugal force is a ______force that pushes you to the outside of a circle during uniform circular motion.fictitious force that is really just the linear momentum of an object in uniform circular motion.The force that keeps the planets in orbit
- 46. Multiple ChoiceWould Henry Cavendish have calculated a different value for G if he would have used copper spheres instead of lead spheres in his experiment.noyes
- 47. Multiple ChoiceWhy do banked curves allow cars to make turns more easily?The normal force reduces the centripetal force needed to turn at that particular speed.The normal force reduces the amount of friction needed to match the required centripetal force.they provide a centrifugal force to balance the centripetal forcethey reduce the force of gravity which also decreases the required centripetal force
- 48. Multiple ChoiceWhy do astronauts float in their space shuttles?They are in a gravity-free environment.They are in free-fallThe gravity from the sun cancels the gravity from the EarthThe gravity from the moon cancels the gravity from the Earth
- 49. Multiple ChoiceWhy don't satellites get closer to the Earth even though the Earth pulls on them?The pull from the sun cancels their movementThe pull from the moon cancels their movementThey are out of Earth's gravitational fieldThey fall at the same rate that the Earth curves away from them
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