
41 The spring of a toy car is wound by pushing the car backward with an average
force of 15 newtons through a distance of 0.50 meter. How much elastic potential
energy is stored in the car’s spring during this process?
(1) 1.9 J
(2) 7.5 J
(3) 30. J
(4) 56 J


42 The graph below shows the relationship between the potential difference across
a metallic conductor and the electric current through the conductor at constant
temperature T_{1}.
Which graph best represents the relationship between potential difference and current
for the same conductor maintained at a higher constant temperature, T_{2}?


43 The diagram below shows a circuit with two resistors.
What is the reading on ammeter A?
(1) 1.3 A
(2) 1.5 A
(3) 3.0 A
(4) 0.75 A


44 The diagram below shows a bar magnet.
Which arrow best represents the direction of the needle of a compass placed at point
A?
(1) ↑
(2) ↓
(3) →
(4) ←


45 Which graph best represents the motion of a block accelerating uniformly down
an inclined plane?


Note that question 46 has only three choices.
46 The graph below shows elongation as a function of the applied force for two springs,
A and B.
Compared to the spring constant for spring A, the spring constant for spring B is
(1) smaller
(2) larger
(3) the same


47 The diagram below represents currents in a segment of an electric circuit.
What is the reading of ammeter A?
(1) 1 A
(2) 2 A
(3) 3 A
(4) 4 A

Base your answers to questions 48 and 49 on the diagram below, which represents
a light ray traveling from air to Lucite to medium Y and back into air.


48 The sine of angle face="Symbol">q_{x} is
(1) 0.333
(2) 0.500
(3) 0.707
(4) 0.886 

49 Light travels slowest in
(1) air, only
(2) Lucite, only
(3) medium Y, only
(4) air, Lucite, and medium Y


50 The diagram below shows two pulses traveling toward each other in a uniform medium.
Which diagram best represents the medium when the pulses meet at point X?


An outfielder throws a baseball to the first baseman at a speed of 19.6 meters
per second and an angle of 30.° above the horizontal.
51 Which pair represents the initial horizontal velocity (v_{x}) and initial
vertical velocity (v_{y}) of the baseball?
(1) v_{x} = 17.0 m/s, v_{y} = 9.80 m/s
(2) v_{x} = 9.80 m/s, v_{y} = 17.0 m/s
(3) v_{x} = 19.4 m/s, v_{y} = 5.90 m/s
(4) v_{x} = 19.6 m/s, v_{y} = 19.6 m/s


Base your answer to question 54 on the circuit diagram below, which shows two resistors
connected to a 24volt source of potential difference.
54 What is the total resistance of the circuit?
(1) 0.42 Ω
(2) 2.4 Ω
(3) 5.0 Ω
(4) 10. Ω
