PhysicsLAB: June 2016, Part 1 (2024)

1. Which quantity is a vector?

(1) power

(2) kinetic energy

(3) speed

(4) weight

2. A 65.0-kilogram astronaut weighs 638 newtons at the surface of Earth. What is the mass of the astronaut at the surface of the Moon, where the acceleration due to gravity is 1.62 meters per second squared?

(1) 10.7 kg

(2) 65.0 kg

(3) 105 N

(4) 638 N

3. When the sum of all the forces acting on a block on an inclined plane is zero, the block

(1) must be at rest

(2) must be accelerating

(3) may be slowing down

(4) may be moving at constant speed

4. The greatest increase in the inertia of an object would be produced by increasing the

(1) mass of the object from 1.0 kg to 2.0 kg

(2) net force applied to the object from 1.0 N to 2.0 N

(3) time that a net force is applied to the object from 1.0 s to 2.0 sec

(4) speed of the object from 1.0 m/s to 2.0 m/s

5. A 100.-kilogram cart accelerates at 0.50 meter per second squared west as a horse exerts a force of 60. newtons west on the cart. What is the magnitude of the force that the cart exerts on the horse?

(1) 10. N

(2) 50. N

(3) 60. N

(4) 110 N

6. Sound waves are described as

(1) mechanical and transverse

(2) mechanical and longitudinal

(3) electromagnetic and transverse

(4) electromagnetic and longitudinal

7. An electrical force of 8.0 × 10⁻⁵ newton exists between two point charges, q₁ and q₂. If the distance between the charges is doubled, the new electrical force between the charges will be

(1) 1.6 × 10⁻⁴ N

(2) 2.0 × 10⁻⁵ N

(3) 3.2 × 10⁻⁴ N

(4) 4.0 × 10⁻⁵ N

8. A blue lab cart is traveling west on a track when it collides with and sticks to a red lab cart traveling east. The magnitude of the momentum of the blue cart before the collision is 2.0 kilogram • meters per second, and the magnitude of the momentum of the red cart before the collision is 3.0 kilogram • meters per second. The magnitude of the total momentum of the two carts after the collision is

(1) 1.0 kg • m/s

(2) 2.0 kg • m/s

(3) 3.0 kg • m/s

(4) 5.0 kg • m/s

9. The diagram below represents the path of a thrown ball through the air.

Which arrow best represents the direction in which friction acts on the ball at point P?

10. A magnetic field would be produced by a beam of

(1) x rays

(2) gamma rays

(3) protons

(4) neutrons

11. The diagram below represents the electric field in the region of two small charged spheres, A and B. What is the sign of the net charge on A and B?

(1) A is positive and B is positive.

(2) A is positive and B is negative.

(3) A is negative and B is negative.

(4) A is negative and B is positive.

12. A horizontal force of 20 newtons eastward causes a 10-kilogram box to have a displacement of 5 meters eastward. The total work done on the box by the 20-newton force is

(1) 40 J

(2) 100 J

(3) 200 J

(4) 1000 J

13. A block initially at rest on a horizontal, frictionless surface is accelerated by a constant horizontal force of 5.0 newtons. If 15 joules of work is done on the block by this force while accelerating it, the kinetic energy of the block increases by

(1) 3.0 J

(2) 15 J

(3) 20. J

(4) 75 J

14. Two objects, A and B, are held one meter above the horizontal ground. The mass of B is twice as great as the mass of A. If PE is the gravitational potential energy of A relative to the ground, then the gravitational potential energy of B relative to the ground is

(1) PE

(2) 2PE

(3) ½PE

(4) 4PE

15. What is the kinetic energy of a 55-kilogram skier traveling at 9.0 meters per second?

(1) 2.5 x 10² J

(2) 5.0 x 10² J

(3) 2.2 x 10³ J

(4) 4.9 x 10³ J

16. A 5.09 x 10¹⁴-hertz electromagnetic wave is traveling through a transparent medium. The main factor that determines the speed of this wave is the

(1) nature of the medium

(2) amplitude of the wave

(3) phase of the wave

(4) distance traveled through the medium

17. A motor does a total of480 joules ofwork in 5.0 seconds to lift a 12-kilogram block to the top of a ramp. The average power developed by the motor is

(1) 8.0 W

(2) 40. W

(3) 96 W

(4) 2400 W

18. A 5.8 x 10⁴-watt elevator motor can lift a total weight of 2.1 x 10⁴ newtons with a maximum constant speed of

(1) 0.28 m/s

(2) 0.36 m/s

(3) 2.8 m/s

(4) 3.6 m/s

19. A stationary police officer directsradiowaves emitted by a radar gun at a vehicle moving toward the officer. Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a

(1) longer wavelength

(2) higher speed

(3) longer period

(4) higher frequency

20. A light wave strikes the Moon and reflects toward Earth. As the light wave travels from the Moon toward Earth, the wave carries

(1) energy, only

(2) matter, only

(3) both energy and matter

(4) neither energy nor matter

21. The time required to produce one cycle of a wave is known as the wave’s

(1) amplitude

(2) frequency

(3) period

(4) wavelength

22. A magnetic compass is placed near an insulated copper wire. When the wire is connected to a battery and a current is created, the compass needle moves and changes its position. Which is the best explanation for the production of a force that causes the needle to move?

(1) Thecopper wire magnetizesthe compass needle and exerts the force on the compass needle.

(2) The compass needle magnetizes the copper wire and exertstheforce on thecompass needle.

(3)The insulation on the wire becomes charged, which exerts the force on the compass needle.

(4) The current in the wire produces a magnetic field that exertstheforceonthecompass needle.

23. A beam of monochromatic light (f = 5.09  1014 Hz) has a wavelength of 589 nanometers in air. What is the wavelength of this light in Lucite?

(1) 150 nm

(2) 393 nm

(3) 589 nm

(4) 884 nm

24. If the amplitude of a sound wave is increased, there is an increase in the sound’s

(1) loudness

(2) pitch

(3) velocity

(4) wavelength

25. In the diagram below, point P is located in the electric field betweentwooppositelycharged parallel plates.

Compared to the magnitude and direction of the electrostatic force on an electron placed at point P, the electrostatic force on a protonplaced at point P has

(1)the same magnitude and the same direction

(2)the same magnitude, but the opposite direction

(3) a greater magnitude, but the same direction

(4)a greater magnitude and the opposite direction

PhysicsLAB: June 2016, Part 1 (2024)

References