NY Regents
January 2008, Part 1
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1. Which is a vector quantity?
(1) speed
(2) work
(3) mass
(4) displacement
2. A race car starting from rest accelerates uniformly at a rate of 4.90 meters per second2. What is the car’s speed after it has traveled 200. meters?
(1) 1960 m/s
(2) 62.6 m/s
(3) 44.3 m/s
(4) 31.3 m/s
3. A ball is thrown straight downward with a speed of 0.50 meter per second from a height of 4.0 meters. What is the speed of the ball 0.70 second after it is released? [Neglect friction.]
(1) 0.50 m/s
(2) 7.4 m/s
(3) 9.8 m/s
(4) 15 m/s
4. A soccer player kicks a ball with an initial velocity of 10. meters per second at an angle of 30.° above the horizontal. The magnitude of the horizontal component of the ball’s initial velocity is
(1) 5.0 m/s
(2) 8.7 m/s
(3) 9.8 m/s
(4) 10. m/s
5. Which object has the greatest inertia?
(1) a 5.00kg mass moving at 10.0 m/s
(2) a 10.0kg mass moving at 1.00 m/s
(3) a 15.0kg mass moving at 10.0 m/s
(4) a 20.0kg mass moving at 1.00 m/s
6. A 60.kilogram physics student would weigh 1560 newtons on the surface of planet X. What is the magnitude of the acceleration due to gravity on the surface of planet X?
(1) 0.038 m/s
^{2}
(2) 6.1 m/s
^{2}
(3) 9.8 m/s
^{2}
(4) 26 m/s
^{2}
7. Two spheres, A and B, are simultaneously projected horizontally from the top of a tower. Sphere A has a horizontal speed of 40. meters per second and sphere B has a horizontal speed of 20. meters per second. Which statement best describes the time required for the spheres to reach the ground and the horizontal distance they travel? [Neglect friction and assume the ground is level.]
(1) Both spheres hit the ground at the same time and at the same distance from the base of the tower.
(2) Both spheres hit the ground at the same time, but sphere A lands twice as far as sphere B from the base of the tower.
(3) Both spheres hit the ground at the same time, but sphere B lands twice as far as sphere A from the base of the tower.
(4) Sphere A hits the ground before sphere B, and sphere A lands twice as far as sphere B from the base of the tower.
8. In the diagram below, a 20.newton force due north and a 20.newton force due east act concurrently on an object, as shown in the diagram below.
The additional force necessary to bring the object into a state of equilibrium is
(1) 20. N, northeast
(2) 20. N, southwest
(3) 28 N, northeast
(4) 28 N, southwest
9. A car’s performance is tested on various horizontal road surfaces. The brakes are applied, causing the rubber tires of the car to slide along the road without rolling. The tires encounter the greatest force of friction to stop the car on
(1) dry concrete
(2) dry asphalt
(3) wet concrete
(4) wet asphalt
10. A car rounds a horizontal curve of constant radius at a constant speed. Which diagram best represents the directions of both the car’s velocity, v, and acceleration, a?
11. A 6.0kilogram block, sliding to the east across a horizontal, frictionless surface with a momentum of 30. kilogram•meters per second, strikes an obstacle. The obstacle exerts an impulse of 10. newton•seconds to the west on the block. The speed of the block after the collision is
(1) 1.7 m/s
(2) 3.3 m/s
(3) 5.0 m/s
(4) 20. m/s
12. If a 65kilogram astronaut exerts a force with a magnitude of 50. newtons on a satellite that she is repairing, the magnitude of the force that the satellite exerts on her is
(1) 0 N
(2) 50. N less than her weight
(3) 50. N more than her weigh
(4) 50. N
13. A 1.0kilogram laboratory cart moving with a velocity of 0.50 meter per second due east collides with and sticks to a similar cart initially at rest. After the collision, the two carts move off together with a velocity of 0.25 meter per second due east. The total momentum of this frictionless system is
(1) zero before the collision
(2) zero after the collision
(3) the same before and after the collision
(4) greater before the collision than after the collision
14. Student A lifts a 50.newton box from the floor to a height of 0.40 meter in 2.0 seconds. Student B lifts a 40.newton box from the floor to a height of 0.50 meter in 1.0 second. Compared to student A, student B does
(1) the same work but develops more power
(2) the same work but develops less power
(3) more work but develops less power
(4) less work but develops more power
15. While riding a chairlift, a 55kilogram skier is raised a vertical distance of 370 meters. What is the total change in the skier’s gravitational potential energy?
(1) 5.4 × 10
^{1}
J
(2) 5.4 × 10
^{2}
J
(3) 2.0 × 10
^{4}
J
(4) 2.0 × 10
^{5}
J
16. The work done on a slingshot is 40.0 joules to pull back a 0.10kilogram stone. If the slingshot projects the stone straight up in the air, what is the maximum height to which the stone will rise? [Neglect friction]
(1) 0.41 m
(2) 41 m
(3) 410 m
(4) 4.1 m
17. A 0.686meterlong wire has a crosssectional area of 8.23 × 10
^{6}
meter
^{2}
and a resistance of 0.125 ohm at 20° Celsius. This wire could be made of
(1) aluminum
(2) copper
(3) nichrome
(4) tungsten
18. A block weighing 40. newtons is released from rest on an incline 8.0 meters above the horizontal, as shown in the diagram below.
If 50. joules of heat is generated as the block slides down the incline, the maximum kinetic energy of the block at the bottom of the incline is
(1) 50. J
(2) 270 J
(3) 320 J
(4) 3100 J
19. The diagram below represents an electron within an electric field between two parallel plates that are charged with a potential difference of 40.0 volts.
If the magnitude of the electric force on the electron is 2.00 × 10
^{15}
newton, the magnitude of the electric field strength between the charged plates is
(1) 3.20 × 10
^{34}
N/C
(2) 2.00 × 10
^{14}
N/C
(3) 1.25 × 10
^{4}
N/C
(4) 2.00 × 10
^{16}
N/C
20. A circuit consists of a 10.0ohm resistor, a 15.0ohm resistor, and a 20.0ohm resistor connected in parallel across a 9.00volt battery. What is the equivalent resistance of this circuit?
(1) 0.200 ohms
(2) 1.95 ohms
(3) 4.62 ohms
(4) 45.0 ohms
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