DEPARTMENT OF EDUCATION Region IVA- CALABARZON DIVISION OF ANTIPOLO CITY SAN JOSE NATIONAL HIGH SCHOOL 2nd GRADING PERIODICAL EXAMINATION GeneraI Physics I Directions. Read the multiple choice questions below and choose the best answer for each item. Write the letter of your choice on your answer sheet. 1. What is the Unit for Torque? a. Nm c. W b. N d. J 2. When an object is experiencing a net torque a. it is in dynamic equilibrium. c. it is rotating. b. it is in static equilibrium. d. it is translating. 3. You apply force to a wrench to tighten a bolt. The wrench breaks in half. Select the best answer for what happens next. Assume the force applied remains constant. a. The torque is now half of what it was, because torque and distance are inversely proportional b. The torque is now half of what it was, because torque and distance are directly proportional c. The torque is now double of what it was, because torque and distance are inversely proportional d. The torque is now double of what it was, because torque and distance are directly proportional 4. A construction worker is worried about applying too much torque to a bolt using his wrench. What could he do to reduce his torque on the bolt? a. Increase the length of the wrench b. Increase the force on wrench c. Reduce the length of the wrench d. Reduce the friction between the bolt and wrench 5. A 800N man is playing on a seesaw with son who has a weight of 200N. If the child is sitting 3 meters away, how far will the man have to sit to balance the seesaw? a. 0.75m c. 1.5m b. 3m d. 1m 6. A wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench? a. 7.5 Nm c. 750 Nm b. 1.5 Nm d. 150 Nm 7. The easiest way to open a heavy door is by applying the force a. Near the hinges c. At the edge of the door far from the hinges b. In the middle of the door d. At the top of the door 8. The moment of inertia of a body does not depend on ...... a. the mass of the body b. the angular velocity of the body c. the axis of rotation of the body d. the distribution of the mass of the body 9. A rigid body is rotating about an axis. to stop the rotation, we have to apply........ a. pressure b. force c. momentum d. torque 10. For the uniform circular motion of a body, the direction of the centripetal force of a body......... a. depends on the mass of the body b. depends on the linear speed of the body c. depends on the sense of rotation(clockwise or anticlockwise) of the body d. does not depend on the sense of rotation(clockwise or anticlockwise) of the body 11. A cyclist moving at a speed of 20 m/s takes a turn. If he doubles his speed, then the chance of overturn........ a. is halved c. becomes 4 times b. is doubled d. becomes 1/4 times 12. The bulging of the earth at the equator is due to ...... a. centripetal force c. gravitational force b. centrifugal force d. electrostatic force 13. A circular disc rotates about an axis passing through its center with a certain angular velocity. Suddenly a small piece of the disc breaks from the edge and falls down. Then ...... a. its M.I. will increase and the angular velocity will decrease b. its M.I. will decrease and the angular velocity will increase c. both, the M.I. and the angular velocity will increase d. both, the M.I. and the angular velocity will decrease 14. The moment of inertia of a body does not depend on ...... a. the mass of the body b. the angular velocity of the body c. the axis of rotation of the body d. the distribution of the mass of the body 15. Two objects of different masses falling freely near the surface of the moon would a. have same velocities at any instant b. have different acceleration c. experience forces of the same magnitude d. undergo a change in their inertia 16. The value of acceleration due to gravity a. is the same on the equator and poles b. is least on pole c. is least on the equator d. increases from pole to equator 17. When a mango falls from a mango tree then a. only the Earth attracts the mango b. only the mango attracts the Earth c. both the mango and the Earth attract each other d. both the mango and the Earth repel each other 18. If the gravitational attraction of the Earth suddenly disappears, which of the following statements will be true? a. The weight of the body will become zero but the mass will remain the same. b. The weight of a body will remain the same but the mass will become zero. c. Both mass and weight become zero d. Neither mass nor weight becomes zero 19. State the definition of Gravitational field strength a. Gravitational force per unit time acting on a body at a point in a gravitational field b. The force between two bodies of mass M and m is directly proportional to the product of their masses c. Gravitational force per unit mass acting on a body at a point in a gravitational field d. All of the above 20. The definition of gravitational field strength is: a. The region of space surrounding a body where other bodies will feel an attractive force due to it. b. The region of space surrounding a body where other bodies will feel an repulsive force due to it. c. The region of space surrounding a charge where other charges will feel an attractive force due to it. d. The region of space surrounding a charge where other charges will feel an repulsive force due to it. 21. The closer together the gravitational field lines..... a. the weaker the gravitational field strength b. the stronger the gravitational field strength c. the more repulsive the gravitational field strength d. All of the above 22. How far out from a mass should the gravitational field lines go.... a. to where the gravitational field becomes negligible b. to twice the diameter of the mass c. infinitely far d. to four times the diameter of the mass 23. The minimum velocity required to leave the atmosphere is called the... a. orbital velocity b. ejection velocity c. terminal velocity d. escape velocity 24. A geostationary satellite orbits the Earth.... a. once every 24 hours b. once every 10-11 hours c. once every week d. once every 4 weeks 25. What is numerically equal to the gravitational field strength at a point P on the Earth's surface? a. the acceleration of free fall at P. b. the change in potential energy per unit distance from P. c. the force acting on any body placed at P. d. the work done in bringing unit mass from infinity to P. 26. A mass m is released just above the surface of a planet with mass M and radius R . Which expression gives its initial gravitational acceleration? a. GmM / R c. G M / R2 b. GmM / R3 d. GmM / 2 R 27. What are Equations for Gravitational Potential Energy? a. Gravitational Potential Energy = Mass x Gravitational Field Strength x Height b. Gravitational Potential Energy = Weight x Height c. Gravitational Potential Energy = Mass x Gravitational Field Strength / Height d. Both A and B. 28. An object's gravitational potential energy store can be increased by... a. by lifting the object higher b. Increasing the velocity (speed) of the object c. decreasing the size of the object d. decreasing the mass of the object 29. In the equation for gravitational potential energy, 'Ep' stands for a. electrical energy c. kinetic energy b. elastic potential energy d. gravitational potential energy 30. The formula for calculating gravitational potential energy is... a. 1/2 x mass2 x gravitational field strength x height b. mass x gravitational field strength x height c. 1/2 x mass x gravitational field strength x height d. mass x gravitational field strength x height2 31. In the equation for gravitational potential energy, 'g' stands for... a. Grams c. gravitational field strength b. Gravity d. energy 32. What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano? Let g = 9.8N/kg a. 5,220,411 J b. 532,695 J c. 73.7 J d. 54,356.6 J 33. What is the gravitational potential energy of a 26 kg eagle, flying at an altitude of 65 m at a speed of 19 m/s? Let g = 9.8N/kg a. 32,110 J b. 1690 J c. 172.4 J d. 16,562 J 34. An Olympic high jumper, with a mass of 82 kg, has a maximum gravitational potential energy of 1970 J. How high was the jump? Let g = 9.8N/kg a. 24 m b. 161,540 m c. 2.5 m d. 201 m 35. What did Newton say about the gravitational force between distant objects? a. It is independent of distance b. It is inversely related to distance squared c. It is proportional to distance squared d. It is inversely related to mass squared 36. Earth pulls satellite, and satellite pulls Earth. Which of the forces is stronger? a. Earth pulling satellite b. Satellite pulling Earth c. Both the same d. Not enough information to determine 37. Why do astronauts in this space shuttle feel weightless? a. They are in free fall, at the same rate as the shuttle b. There is an equal force pulling them away from Earth c. The gravity at that distance is too small to feel d. They pull on Earth as hard as it pulls on them e. 38. The planets in our solar system all have ______________ orbits. a. spherical b. elliptical c. circular d. highly eccentric 39. You want to launch a satellite into Earth orbit. You already know Earth’s mass, and the satellite’s mass. What additional information do you need to calculate the gravitational force that will act on it? a. The height it will have b. The acceleration of gravity at the surface c. Earth's distance from the Sun d. The satellite's size 40. An orbit with the eccentricity of 0.9 would have more of a(n) __________ shaped orbit. a. spherical b. elongated c. circular d. spiral 41. Which of the following was discovered by Kepler with the use of Brahe’s extensive collection of data in observational astronomy? a. Law of Motion b. Law of Relativity c. Law of Acceleration d. Law of Planetary Motion 42. Where is the planet moving faster? a. around segment A b. around segment B c. around either segment - the speed doesn't change d. impossible to know 43. The diagram below shows a moon revolving around a planet in an elliptical orbit. At which position is the moon traveling fastest? a. location 1 b. location 2 c. location 3 d. location 4 44. Which planet of those shown will take the least amount of time to revolve around the Sun? a. Mercury b. Venus c. Earth d. Mars 45. A comet moves much faster when it passes closer to the Sun than when it is further away. What is the primary cause in the change of the comet’s orbital speed? a. it would be going downhill in that position b. the sun's solar wind blows it faster c. The sun's gravitational field. d. Saturn's magnetic field. 46. A mass on a spring undergoes SHM. The maximum displacement from the equilibrium is called? a. A. Period B. Frequency C. Amplitude D. Wavelength 47. In a periodic process, the number of cycles per unit of time is called? a. Period B. Frequency C. Amplitude D. Wavelength 48. In a periodic process, the time required to complete one cycle is called ? a. Period B. Frequency C. Amplitude D. Wavelength b. A mass in the diagram to the right undergoes simple harmonic motion. Use this diagram to answer questions 49 through 52. 49. When the mass reaches point x = +A its instantaneous velocity is? a. Maximum and positive b. Maximum and negative c. Zero d. Less than maximum and positive 50. When the mass reaches point x = 0 its instantaneous velocity is? a. Maximum and can be positive or negative b. Constant and doesn’t depend on the location c. Zero d. Slightly less than maximum and positive 51. When the mass reaches point x = +A its instantaneous acceleration is? a. Maximum and positive b. Maximum and negative c. Zero d. Slightly less than maximu m and positive 52. When the mass reaches point x = 0 its instantaneous acceleration is? a. Maximum and positive b. Maximum and negative c. Zero d. Slightly less than maximu m and positive 53. A mass-spring oscillating system undergoes SHM with maximum amplitude A. If the amplitude is doubled what effect will it produce on the mechanical energy of the system? a. The energy is increased by factor two b. The energy is increased by factor four c. The energy is decreased by factor two d. The energy is decreased by factor four e. It doesn’t affect the energy 54. A mass-spring oscillating system undergoes SHM with maximum amplitude A. If the spring constant is doubled what effect will it produce on the mechanical energy of the system? a. The energy is increased by factor two b. The energy is increased by factor four c. The energy is decreased by factor two d. The energy is decreased by factor four 55. An object with a mass M is suspended from an elastic spring with a spring constant k. The object oscillates with maxim um a mplitude A. If the amplitude of oscillations is doubled, how it will change the period of oscillations ? a. The period is increased by factor four b. The period is decreased by factor two c. The period is decreased by factor four d. The period remains the same 56. An object with a mass M is suspended from an elastic sp ring with a spring constant k. The object oscillates with period T. If the mass of oscillations is quadrupled, how it will change the period of oscillations? a. The period is increased by facto r two b. The period is increased by facto r four c. The period is decreased by facto r two d. The period is decreased by facto r four 57. An object with a mass M is suspended from an elastic spring with a spring constant k. The object oscillates with period T on the surface of Earth. If the oscillating system is moved to the surface of Moon, how it will change the period of oscillations? Acceleration due to gravity on moon—— 1.6 mls' a. The period is increased by factor four b. The period is decreased by factor 16 c. The period is decreased by factor four d. The period remains the same 58. A mass M suspended from a string L undergoes SHM. Which of the following is true about the period of oscillations? a. The period increases with increasing amplitude b. The period increases with increasing mass c. The period increases with decreasing length d. The period increases with increasing length 59. A simple pendulum is moved from the Earth to the Moon. How does it change the period of oscillations? Acceleration due to gravity on moon—— 1.6 mls› a. The period is increased by factor b. The period is increased by factor four c. The period is decreased by factor x d. The period is decreased by factor four e. The period remains the same 60. The length of a si mple pendulum oscillating with a period T is quad rupled, what is the new period of oscillations in terms of T? a. 2T b.4T c. T d.
