NY Regents
June 2008, Part 3
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41. The diagram below represents two concurrent forces.
Which vector represents the force that will produce equilibrium with these two forces?
42. Which graph best represents the relationship between the magnitude of the centripetal acceleration and the speed of an object moving in a circle of constant radius?
43. The diagram below represents two masses before and after they collide. Before the collision, mass m
_{A}
is moving to the right with speed v, and mass m
_{B}
is at rest. Upon collision, the two masses stick together.
Which expression represents the speed, v', of the masses after the collision? [Assume no outside forces are acting on m
_{A}
or m
_{B}
.]
44. Which combination of fundamental units can be used to express energy?
(1) kg•m/s
(3) kg•m/s
^{2}
(2) kg•m
^{2}
/s
(4) kg•m
^{2}
/s
^{2}
45. An object is thrown vertically upward. Which pair of graphs best represents the object’s kinetic energy and gravitational potential energy as functions of its displacement while it rises?
46, Charge flowing at the rate of 2.50 × 10
^{16}
elementary charges per second is equivalent to a current of
(1) 2.50 × 10
^{13}
A
(2) 6.25 × 10
^{5}
A
(3) 4.00 × 10
^{–3}
A
(4) 2.50 × 10
^{–3}
A
47. An electric drill operating at 120. volts draws a current of 3.00 amperes. What is the total amount of electrical energy used by the drill during 1.00 minute of operation?
(1) 2.16 × 10
^{4}
J
(2) 2.40 × 10
^{3}
J
(3) 3.60 × 10
^{2}
J
(4) 4.00 × 10
^{1}
J
48. The diagram below represents a transverse wave traveling to the right through a medium. Point A represents a particle of the medium.
In which direction will particle A move in the next instant of time?
up
down
left
right
49. Which graph best represents the relationship between photon energy and photon frequency?
Base your answers to questions 50 and 51 on the table below, which shows data about various subatomic particles.
50. Which particle listed on the table has the opposite charge of, and is more massive than, a proton?
(1) antiproton
(2) neutron
(3) lambda
(4) omega
51. All the particles listed on the table are classified as
(1) mesons
(2) hadrons
(3) antimatter
(4) leptons
52. The graph below represents the velocity of an object traveling in a straight line as a function of time.
Determine the magnitude of the total displacement of the object at the end of the first 6.0 seconds.
Base your answers to questions 53 and 54 on the information below.
A 65kilogram polevaulter wishes to vault to a height of 5.5 meters.
53. Calculate the minimum amount of kinetic energy the vaulter needs to reach this height if air friction is neglected and all the vaulting energy is derived from kinetic energy. [Show all work, including the equation and substitution with units.]
54. Calculate the speed the vaulter must attain to have the necessary kinetic energy. [Show all work, including the equation and substitution with units.]
Base your answers to questions 55 through 57 on the information and vector diagram below.
A dog walks 8.0 meters due north and then 6.0 meters due east.
55. Using a metric ruler and the vector diagram, determine the scale used in the diagram.
56. On the diagram in your answer booklet, construct the resultant vector that represents the dog’s total displacement.
57. Determine the magnitude of the dog’s total displacement.
58. Two small identical metal spheres, A and B, on insulated stands, are each given a charge of +2.0 × 10
^{–6}
coulomb. The distance between the spheres is 2.0 × 10
^{–1}
meter. Calculate the magnitude of the electrostatic force that the charge on sphere A exerts on the charge on sphere B. [Show all work, including the equation and substitution with units.]
Base your answers to questions 59 and 60 on the information and diagram below.
A 10.0meter length of
copper wire
is at 20°C.
The radius of the wire is 1.0 × 10
^{–3}
meter.
59. Determine the crosssectional area of the wire.
60. Calculate the resistance of the wire. [Show all work, including the equation and substitution with units.]
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