  Science Mathematics Technology
Education For Building America's Future!

# January 23, 2001

This exam measures your knowledge of Physics. It contains only part one of the exam,which covers most of the curriculum. When you are finished filling out the test press the "Submit" button.

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1) The maximum time allowed for the completion of this examination is approximately

1. 102 s
2. 103 s
3. 104 s
4. 105 s

(Hint; All Science regents exams are allowed the same amount.)

2) The diagram below represents the relationship between velocity and time of travel for four cars, A,B,C, and D in straight line motion Which car has the greatest acceleration during the time interval 10. seconds and 15 seconds?

1. A
2. B
3. C
4. D

3) The diagram below shows a block on a horizontal frictionless surface. A 100.-newton force acts on the block at an angle of 30.o above the horizontal. What is the magnitude of force F if it establishes equilibrium?

1. 50.0 N
2. 86.6 N
3. 100. N
4. 187 N

4) Approximately how far will an object near Earth's surface fall in 3.0 seconds?

1. 88m
2. 44m
3. 29m
4. 9.8m

5) A 5-newton force directed east and a 5-Newton force directed north act concurrently on a point. The resultant of the two forces is

1. 5 N northeast
2. 10. N southwest
3. 7 N northeast
4. 7 N southeast

6) Into how many possible components can a single force be resolved?

1. an unlimited number
2. two components
3. three components
4. four components at right angles to each other

7) The graph below represents the relationship between the forces applied to an object and the corresponding accelerations produced. What is the inertial mass of the object?

1. 1.0 kg
2. 2.0 kg
3. 0.50 kg
4. 1.5 kg

8) Which is a derived unit?

1. meter
2. second
3. kilogram
4. newton

9) What is the magnitude of the gravitational force between two 5.0 kilogram masses separated by a distance of 5.0 meters.

1. 5.0 x10o N
2. 3.3 x 10-10 N
3. 6.7 x 10-11 N
4. 1.3 x 10-11 N

10) What was the displacement of the mass hanger (H) shown in the diagram after a 0.20 kilogram mass is loaded on it? {Assume the hanger is at rest in both positions.} 1. 12.30 cm
2. 12.50 cm
3. 12.70 cm
4. 13.30 cm

11) Two cars having different weights are traveling on a level surface at different constant velocities. Within the same time interval, greater force will always be required to stop the car that has the greater

1. weight
2. kinetic energy
3. velocity
4. momentum

12) a 0.50 kilogram bullet is fired from a 4.0 kilogram rifle that is initially at rest. If the bullet leaves the rifle with momentum having a magnitude of 20. kilogram*meters per second, the rifle will recoil with a momentum having a magnitude of

1. 1,6000 kg*m/s
2. 80. kg*m/s
3. 20. kg*m/s
4. 0.25 kg*m/s

(the symbol * represents a dot)

13) A 2.0 kilogram mass weighs 10. newtons on planet X. the acceleration due to gravity on planet X is approximately

1. 0.20 m/s2
2. 5.0 m/s2
3. 9.8 m/s2
4. 20. m/s2

Note that questions 14 and 15 have only three choices

14) The graph below represents the motion of an object. According to the graph, as time increases, the velocity of the object

1. decreases
2. increases
3. remains the same

15) A wooden block is at rest on a horizontal steel surface. If a 10. Newton force applied parallel to the surface is required to set the block in motion, how much force is required to keep the block moving at a constant velocity?

1. less than 10. N
2. greater than 10. N
3. 10. N

16) In the diagram below, a 20.0 Newton force is used to push a 2.00 kilogram cart a distance of 5.00 meters The work done on the cart is

1. 100. J
2. 200. J
3. 150. J
4. 40.0 J
Note that questions 17 and 18 have only three choices.

17) The diagram below shows two identical wooden planks, A and B at different incline angles, used to slide concrete blocks from a truck. Compared to the amount of work done against friction by a block sliding down plank A, the work done against friction sliding down B is

1. less
2. more
3. the same

18) Two vacationers walk out on a horizontal pier shown in the diagram below As they approach the end of the pier, their gravitational potential energy will

1. decrease
2. increase
3. remain the same

19) A girl weighing 500. newtons takes 50. Seconds to climb a flight of stairs 18 meters high Her power output vertically is

1. 9,000 W
2. 4,000 W
3. 1,400 W
4. 180 W

20) The graph below represents the elongation of a spring as a function of the applied force. How much work must be done to stretch the spring 0.40 meter?

1. 4.8 J
2. 6.0 J
3. 9.8 J
4. 24 J

21) Metal sphere A has a charge of +12 elementary charges and identical sphere B has a charge of +16 elementary charges. After the two spheres are brought into contact, the charge on sphere A is

1. -2 elementary charges
2. +2 elementary charges
3. +14 elementary charges
4. +28 elementary charges

22) Electrostatic force F exists between two point charges. If the distance between charges is tripled, the force between the charges will be

1.  F 9
2.  F 3
3.  3F
4.  9F

23) Which net charge could be found on an object?

1. +3.2 x10-18 C
2. +2.4 x 10-19 C
3. -1.8 x 10-18 C
4. -0.80 x 10-19 C

24) In the diagram below, two identical spheres, A and B have equal net positive charges. Which arrow best represents the direction of their resultant electric field at point P? 25) How much work is done in moving 5.0 coulombs of charge against a potential difference of 12 volts?

1. 2.4 J
2. 12 J
3. 30. J
4. 60. J

26) Compared to insulators, metals are better conductors of electricity because metals contain more free

1. protons
2. electrons
3. positive ions
4. negative ions

27) If a 15 ohm resistor is connected in parallel with a 30. ohm resistor, the equivalent resistance is

1.  15 2.  2 3.  10 4.  45 28) Identical charges A, B, and C are located between two oppositely charged parallel plates, as shown in the diagram below The magnitude of the force exerted on the charges by the electric field between the plates is

1. least on A and greatest on C
2. greatest on A and least on C
3. the same on A and C, but less on B
4. The same on a, B, and C

29) A metal wire has a length L and cross-sectional area A. The resistance of the wire is directly proportional to

1.  L A
2.  L x A
3.  A L
4.  L + A

30) The diagram below shows electric currents in conductors that meet at junction P. What are the magnitude and direction of the current in conductor PQ?

1. 9 A toward P
2. 9 A toward Q
3. 5 A toward P
4. 5 A toward Q

31) A glass rod becomes positively charged when it is rubbed with silk. This net positive charge accumulates because the glass rod

1. gains electrons
2. gains protons
3. loses electrons
4. loses protons

Base your answers to questions 32 and 33 on the diagram below, which shows two resistors and three ammeters connected to a voltage source. 32) What is the potential difference across the source?

1. 440 V
2. 220 V
3. 120 V
4. 60. V

33) What is the current reading of ammeter A1?

1. 10.0 A
2. 6.0 A
3. 3.0 A
4. 4.0 A

34) In the diagram below, a wire carrying an electron current into the page, as denoted by X, is placed in a magnetic field. The magnetic field exerts a force on the wire toward point

1. A
2. B
3. C
4. D

35) A wire carries a current of 2.0 amperes. How many electrons pass a given point in this wire in 1.0 second?

1. 1.3 x 1018
2. 2.0 x 1018
3. 1.3 x 1019
4. 2.0 x 1019

36) How much time is required for an operating 100 watt light bulb to dissipate 10 joules of electrical energy?

1. 1 s
2. 0.1 s
3. 10 s
4. 1000 s

Note that question 37 has only three choices

37) A wire conductor is moved at a constant speed perpendicularly to a uniform magnetic field. If the strength of the magnetic field is increased, the induced potential across the ends of the conductor

1. decreases
2. increases
3. remains the same

38) A light spring is attached to a heavier spring at one end. a A pulse traveling along the light spring is incident on the boundary with the heavier spring. At this boundary, the pulse will be

1. totally reflected
2. totally absorbed
3. totally transmitted into the heavier spring
4. partially reflected and partially transmitted into the heavier spring

39) As a wave travels through a medium, the particles of the medium vibrate in the direction of the wave's travel. What type of wave is traveling through the medium?

1. longitudinal
2. torsional
3. transverse
4. hyperbolic

40) A wave completes one vibration as it moves a distance of 2 meters as a speed of 20 meters per second. What is the frequency of the wave?

1. 10 Hz
2. 2 Hz
3. 20 Hz
4. 40 Hz

41) What is the period of a wave if 20 crests pass an observer in 4 seconds?

1. 80 s
2. 0.2 s
3. 5 s
4. 4 s

42) A beam of green light may have a frequency of

1. 5.0 x 10-7 Hz
2. 1.5 x 102 Hz
3. 3.0 x 108 Hz
4. 6.0 x 1014 Hz

43) The diagram below shows a pulse moving to the right in a rope. A is a point on the rope. .

Which arrow best shows the direction of movement of point A at this instant? 44) The diagram below represents a periodic wave. Which two points on the wave are in phase?

1. A and D
2. A and G
3. C and K
4. D and I

45) Two waves traveling in the same medium interfere to produce a standing wave. What is the phase difference between the two waves at a node?

1. 0o
2. 90o
3. 180o
4. 360o

46) When yellow light having a wavelength of 5.8 x 10-7 meter shines through two slits 2.0 x 10-4 meter apart, an interference pattern formed on a screen 2.0 meters from the slits. What distance separates the first-order maximum and the central maximum?

1. 5.8 x 10-11 cm
2. 1.5 x 10-3 cm
3. 5.8 x 10-3 cm
4. 6.9 x 102 cm

47) The diagram below shows parallel rays of light incident on an irregular surface. Which phenomenon of light is illustrated by the diagram?

1. diffraction
2. refraction
3. regular reflection
4. diffuse reflection

48) What is the speed of light in a medium having an absolute index of refraction 2.3?

1. 0.77 x 108 m/s
2. 1.3 x 108 m/s
3. 1.5 x 108 m/s
4. 2.3 x 108 m/s

Please note that questions 49 through 52 have only three choices.

49) The driver of a car blows the horn as the car approached a crosswalk. Compared to the actual pitch of the horn, the pitch observed by a pedestrian in the crosswalk is

1. lower
2. higher
3. the same

50) Compared to wavelengths of visible light, the wavelengths of ultraviolet light are

1. shorter
2. longer
3. the same

51) As a pulse travels along a rope, the pulse loses energy and its amplitude

1. decreases
2. increases
3. remains the same

52) The diagram below shows a ray of light passing through two media. When the waves travels from medium A into medium B, its speed

1. decreases
2. increases
3. remains the same

53) Experiments performed with light indicate that light exhibits

1. particle properties only
2. wave properties only
3. both particle and wave properties
4. neither particle and wave properties

54) What is the energy of a quantum of light having a frequency of 6.0 x 1014 hertz?

1. 1.6 x 10-19 J
2. 4.0 x 10-19 J
3. 3.0 x 108 J
4. 5.0 x 10-7 J

55) Photons with an energy of 7.9 eletronvolts strike a zinc plate, causing the emission of photoelectrons with a maximum kinetic energy of 4.0 electronvolts. The work function of the zinc plate is

1. 11.9 eV
2. 7.9 eV
3. 3.9 eV
4. 4.0 eV  