Science Mathematics Technology
Education For Building America's Future!

# June 17, 1997

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) What is the total displacement of a student who walks 3 blocks east, 2 blocks north, 1 block west, and then 2 blocks south?

1. 0
2. 2 blocks east
3. 2 blocks west
4. 8 blocks

2) A baseball pitcher throws a fast ball at 42 meters per second. If the batter is 18 meters from the pitcher, approximately how much time does it take for the ball to reach the batter?

1. 1.9s
2. 2.3s
3. 0.86s
4. 0.43s

3) The length of a high school physics classroom is probably closest to

1. 10-2 m
2. 10-1 m
3. 101 m
4. 104 m

4) A stone is dropped from a bridge 45 meters above the surface of a river. Approximately how many seconds does it take to reach the water's surface

1. 1.0s
2. 10.s
3. 3.0s
4. 22s

5)A 150.-newton force, F1 and a 200.-newton force, F2 are applied simultaneously to the same point on a large crate resting on a frictionless, horizontal surface. Which diagram shows the forces positioned to give the crate the greatest acceleration?

6) The displacement-time graph below represents the motion of a cart along a straight line.

During which interval was the cart accelerating?

1. AB
2. BC
3. CD
4. DE

7) A ball rolls through a hollow tube lying flat on a horizontal table top. Which diagram best shows the path of the ball after emerging from the tube, as viewed from above?

8)A 100.-newton force acts on point P, as shown in the diagram.

The magnitude of the vertical component of this force is approximately

1. 30.N
2. 50. N
3. 71 N
4. 87 N

Base your answers to questions 9 and 10 on the information below.

A 1,000 kilogram car traveling with a velocity of +20. meters per second decelerates uniformly at -5.0 meters persecond2 until it comes to rest.

9) What is the total distance the car travels as it decelerates to rest?

1. 10. m
2. 20. m
3. 40. m
4. 80. m

10) What is the magnitude of the impulse applied to the car to bring it to rest?

1. 1.0 X 104 N*S
2. 2.0 X 104 N*S
3. 3.9 X 104 N*S
4. 4.3 X 104 N*S

(Please note the symbol * represents a dot)

11) The graph below shows the weight of three objects on planet X as a function of their mass.

The acceleration due to gravity on planet X is approximately

1. 0.17 m/s2
2. 6.0 m/s2
3. 9.8 m/s2
4. 50. m/s2

12) What is the magnitude of the net force acting on a 2.0 X103-kilogram car as it accelerates from rest to a speed of 15 meters per second in 5.0 seconds?

1. 6.0 X103 N
2. 2.0 X104 N
3. 3.0 X104 N
4. 6.0 X104 N

13) In the diagram below, surface B of the wooden block has the same texture as surface A, but twice the area of the surface A

If force F is required to slide the block at a constant speed across the table on surface A, approximately what force is required to slide the block at a constant speed across the table on surface B?

1. F
2. 2F
3. 1/2F
4. 4F

14) The diagram below shows two cart on a horizontal, frictionless surface being pushed apart when a compressed spring attached to one of the carts is released. Cart A has a mass of 3.0 kilograms and cart B has a mass of 5.0 kilograms. The speed of cart A is 0.33 meter per second after the spring is released.

If the carts are initially at rest, what is the approximate speed of cart B after the spring is released?

1. 0.12 m/s
2. 0.20 m/s
3. 0.33 m/s
4. 0.55 m/s

15) The magnitude of the gravitational force of attraction between Earth and the Moon is approximately

1. 2.1 X 1020 N
2. 6.0 X 1024 N
3. 6.7 X 10-11 N
4. 7.8 X 1028 N

16) How much work is done on a downhill skier by an average force of 9.8 X 102 newtons to stop her in a distance of 10. Meters?

1. 1.0 X101 J
2. 9.8 X101 J
3. 1.0 X103 J
4. 9.8 X103 J

17) Which variable expression is paired with a corresponding unit?

 1) mass * distance time and watt
 2) mass * distance2 time and watt
 3) mass * distance2 time2 and joule
 4) mass * distance time3 and joule

(Please note the symbol * represents a dot)

18) A spring has a spring constant of 120 newtons per meter. How much potential energy is stored in the spring as it is stretched 0.20 meter?

1. 2.4 J
2. 4.8 J
3. 12 J
4. 24 J

19) The graph below shows the relationship between elongation of a spring and the force applied to the spring causing it to stretch.

What is the spring constant for this spring?

1. 0.20 N/m
2. 2.0 N/m
3. 25 N/m
4. 50. N/m

20) A motor having a maximum power rating of 8.1 x 104 watts is used to operate an elevator with a weight of 1.8 x 104 newtons. What is the maximum weight this motor can lift at an average speed of 3.0 meters per second?

1. 6.0 x 103 N
2. 1.8 x 104 N
3. 2.4 x 104 N
4. 2.7 x 104 N

21) A cart of mass M on a frictionless track starts from rest at the top of a hill having a height of h, as shown in the diagram below.

What is the kinetic energy of the cart when it reaches the top of the next hill, having height h2?

1. Mgh1
2. Mg(h1 - h2)
3. Mg(h2 - h3)
4. 0

22) When a plastic rod is rubbed with wool, the wool acquires a positive charge because

1. electrons are transferred from the wool to the rod.
2. protons are transferred from the wool to the rod.
3. electrons are transferred from the rod to the wool.
4. protons are transferred from the rod to the wool.

23) Three identical metal spheres are mounted on insulating stands. Initially, sphere A has a net charge q and spheres B and C are uncharged. Sphere A is touched to sphere B and removed. Then sphere A is touched to sphere C and removed. what is the final charge of sphere A?

 1) q 2) q_ 2 3) q_ 3 4) q_ 4

24) A distance of 10 x 103 meters separates the charge at the bottom of a cloud and the ground. The electric field intensity between the bottom of the cloud and then ground is 2.0 x 104 newtons per coulomb. What is the potential difference between the bottom of the cloud and the ground?

1. 1.3 x 1023 V
2. 2.0 x 101 V
3. 2.0 x 107 V
4. 5.0 x 10-2 V

25) The diagram below shows proton P located at point A near a positively charged sphere.

If 6.4 x 10-19 joule of work is required to move the proton from point a to point B, the potential difference between a and B is

1. 6.4 x 10-19 V
2. 4.0 x 10-19 V
3. 6.4 V
4. 4.0 V

26) What is the net static electricity charge on a metal sphere having an excess of +3 elementary charges?

1. 1.6 x 10-19C
2. 4.8 x 10-19C
3. 3.0 x 100C
4. 4.8 x 1019C

27) The diagram below shows currents in a segment of an electric circuit.

What is the reading of ammeter A?

1. 8 A
2. 2 A
3. 3 A
4. 13 A

28) An operating lamp draws a current of 0.50 ampere. The amount of charge passing through the lamp in 10. seconds is

1. 0.050 C
2. 2.0 C
3. 5.0 C
4. 20. C

29) Which graph best represents the relationship between the resistance of a copper wire of uniform cross-sectional area and the wire's length at constant temperature?

30) Which is a vector quantity?

1. electric charge
2. electrical resistance
3. electrical potential difference
4. electric field intensity

31) To increase the brightness of a desk lamp, a student replaces a 60-watt bulb with a 100-watt bulb. Compared to the 60-watt bulb, the 100-watt bulb has

1. less resistance and draws more current.
2. less resistance and draws less current.
3. more resistance and draws more current.
4. more resistance and draws less current.

32) An electric dryer consumes 6.0 x 106 joules of energy when operating at 220 volts for 30 minutes (1800 seconds). During operation, the dryer draws a current of approximately

1. 10. A
2. 15 A
3. 20. A
4. 25 A

33) The diagram below shows a compass placed near the north pole, N, of a bar magnet.

Which diagram best represents the position of the needle of the compass as it responds to the magnetic field of the bar magnet?

34) The diagram below represents the magnetic field around point P, at the center of a current carrying wire.

What is the direction of electron flow in the wire?

1. from A to B
2. from B to A
3. from P into the page
4. from P out of the page

35) The diagram below represents a straight conductor between the poles of a permanet magnet.

If the electrons flow within the conductor in the direction shown, then the magnetic force on the conductor is directed

1. toward N
2. toward S
3. into the page
4. out of the page

36) The diagram below shows a tranverse wave moving to the right along a rope.

As the wave passes point X, the motion of X will be

1. up, then down
2. down, then up
3. left, then right
4. in a circle

37) The frequency of a light wave is 5.0 x 1014 hertz. What is the period of the wave?

1. 1.7 x 106s
2. 2.0 x 10-15s
3. 6.0 x 10-7s
4. 5.0 x 10-14s

38) The amplitude of a sound wave is to its loudness as the amplitude of a light wave is to its

1. brightness.
2. frequency.
3. color.
4. speed.

39) The speed of light in glycerol is approximately

1. 1.0 x 107 m/s
2. 2.0 x 108 m/s
3. 3.0 x 108 m/s
4. 4.4 x 108 m/s

40) In the diagram below, a water wave having a speed of 0.25 meter per second causes a cork to move up and down 4.0 times in 8.0 seconds.

What is the wavelength of the water wave?

1. 1.0 m
2. 2.0 m
3. 8.0 m
4. 0.50 m

41) The driver of a car sounds the horn while traveling toward a stationary person. Compared to the sound of the horn heard by the driver, the sound heard by the stationary person has

1. lower pitch and shorter wavelength.
2. lower pitch and longer wavelength.
3. higher pitch and shorter wavelength.
4. higher pitch and longer wavelength.

42) The diagram below shows a ray of monochromatic light incident on an alcohol-flint glass interface.

What occurs as the light travels from alcohol into flint glass?

1. The speed of the light decreases and the ray bends toward the normal.
2. The speed of the light decreases and the ray bends away from the normal.
3. The speed of the light increases and the ray bends toward the normal.
4. The speed of the light increases and the ray bends away from the normal.

43) The diagram below shows straight wave fronts passing through an openning in a barrier.

This phenomenon is called

1. reflection.
2. refraction.
3. polarization.
4. diffraction.

44) The absolute index of refraction for a substance is 2.0 for light having a wavelength of 5.9 x 10-7 meter. In this substance, what is the critical angle for light incident on a boundary with air?

1. 30o
2. 45o
3. 60o
4. 90o

45) A ray of monochromatic light (L = 5.9 x 10-7meter) traveling in air is incident on an interface with liquid at angle of 45o , as shown in the diagram below.
(L represents the letter lambda)

If the absolute index of refraction of the liquid is 1.4, the angle of refraction for the light ray is closest to

1. 10o.
2. 20o.
3. 30o.
4. 40o.

46) Which phenomenon can occur with light, but not with sound?

1. interference
2. polarization
3. refraction
4. the Doppler effect

47) As shown in the diagram below, speakers S1 and S2, separated by a distance of 0.50 meter, are producing sound of the same constant frequency. A person walking along a path 4.0 meters in front of the speakers hears the sound reach a maximum intensity every 2.0 meters.

What is the wavelngth of the sound produced by the speakers?

1. 1.0 m
2. 0.063 m
3. 0.25 m
4. 4.0 m

48) Which diagram best represents light emitted from a coherent light source?

49) When 8.0-electronvolt photons strike a photoemissive surface, the maximum kinetic energy of the ejected photoelectrons is 6.0 electronvolts. The work function of the photoemissive surface is

1. 0.0 eV
2. 2.0 eV
3. 7.0 eV
4. 14.0 eV

50) If the momentum of a particle is 1.8 x 10-22 kilogram-meter per second, its matter wavelength is approximately

1. 1.2 x 10-55 m
2. 2.7 x 1011 m
3. 3.7 x 10-12 m
4. 5.0 x 10-7 m

51) The threshold frequency of a photoemissive surface is 7.1 x 1014 hertz. Which electromagnetic radiation, incident upon the surface, will produce the greatest amount of current?

52) Which diagram shows a possible path of an alpha particle as it passes very near the nucleus of a gold atom?

53) A hydrogen atom could have an electron energy level transition from n = 2 to n= 3 by absorbing a photon having an energy of

1. 1.51 eV
2. 1.89 eV
3. 4.91 eV
4. 10.20 eV

Note that questions 54 and 55 have only three choices.

54) A bicyclist accelerates from rest to a speed of 5.0 meters per second in 10. seconds. During the same 10. seconds, a car accelerates from a speed of 22 meters per second to a speed of 27 meters per second. Compared to the acceleration of the bicycle, the acceleration of the car is

1. less.
2. greater.
3. the same.

55) A student drops two eggs of equal mass simultaneously from the same height. Egg A lands on the tile floor and breaks. Egg B lands intact, without bouncing, on a foam pad lying on the floor. Compared to the magnitude of the impulse on egg A as it lands, the magnitude of the impulse on egg B as it lands is

1. less.
2. Greater
3. The same.