Download Mid Term Pre assessment

Mid Term Pre Assessment
Multiple Choice
Identify the choice that best completes the statement or answers the question.
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1. How many significant figures are in 70,200?
a. two b. four c. three d. five
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2. Which of the following shows 0.0000043 g?
a. 4.3  107 g
b. 4.3  106 g
c. 4.3  10–6 g
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3. A loaf of bread weighs 1,362 g. The weight in kilograms is
a. 1.362 kg. b. 1,362 kg. c. 0.1362 kg. d. 0.01362 kg.
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4. An object is in motion when
a. you observe the object move. b. the object’s speed increases. c. the object’s displacement is greater
than the distance traveled. d. the object changes position relative to a stationary reference point.
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5. A car moving at an average speed of 55.0 mi/h for 4.25 h has traveled
a. 0.08 mi. b. 13 mi. c. 55 mi. d. 234 mi.
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6. Speeding up, slowing down, and changing direction is best described as
a. velocity. b. distance. c. displacement.
d. acceleration.
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7. A cyclist is traveling at an initial speed of 10.0 m/s. She accelerates at a rate of 0.500 m/s2. What is her final
speed after 9.0 s?
a. 14.5 m/s b. 14.5 m/s2 c. 5.5 m/s d. 5.5 m/s2
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8. The law that states that every object maintains constant velocity unless acted on by an unbalanced force is
a. Newton’s first law of motion. b. Newton’s second law of motion. c. Newton’s third law of motion.
d. the law of conservation of momentum.
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9. The law that states that for every action force there is an equal and opposite reaction force is
a. Newton’s first law of motion. b. Newton’s second law of motion. c. Newton’s third law of motion.
d. the law of conservation of momentum.
d. 4.3  10–7 g
____ 10. The law that states that the unbalanced force acting on an object equals the object’s mass times its
acceleration is
a. Newton’s first law of motion. b. Newton’s second law of motion. c. Newton’s third law of motion.
d. the law of conservation of momentum.
____ 11. What is the unbalanced force that slows down a ball rolling across the floor?
a. the force of friction b. the force of gravity c. the force of inertia d. the force of momentum
____ 12. Which object has the greatest inertia?
a. a tennis ball b. a bowling ball c. a beach ball
d. a volleyball
____ 13. A force of 240.0 N causes an object to accelerate at 3.2 m/s2. What is the mass of the object?
a. 0.013 kg b. 75 kg c. 240 kg d. 768 kg
____ 14. Which statement about weight is incorrect?
a. An object weighs more on the moon than it weighs on Earth. b. A change in an object’s location can
change the object’s weight. c. An object’s weight is directly proportional to its mass. d. The weight of an
object depends on gravity.
____ 15. A 10.0 kg dog chasing a rabbit north at 6.0 m/s has a momentum of
a. 0.6 kg m/s.
b. 60.0 kg m/s north.
c. 60.0 m/s.
d. 60.0 kg/s.
____ 16. What is the mechanical advantage of a ramp that is 10 meters long and 2 meters high?
a. 20 b. 5 c. 8 d. 15
____ 17. A boy exerts an average force of 65 N when he lifts a box 1.2 meters. How much work does he do?
a. 0 J b. 54 J c. 66 J d. 78 J
____ 18. How much power is required to do 180 J of work in 2.4 s?
a. 7.5 W b. 75 W c. 178 W d. 430 W
____ 19. What is the kinetic energy of a 1.40 kg discus with a speed of 22.5 m/s?
a. 15.8 J b. 31.5 J c. 354 J d. 709 J
____ 20. A dog running at a speed of 12 m/s has 1,080 J of kinetic energy. What is the mass of the dog?
a. 7.5 kg b. 15 kg c. 30 kg d. 45 kg
____ 21. As a dropped penny falls toward the ground, _____ energy is converted to _____ energy.
a. thermal, potential b. kinetic, vibrational c. kinetic, heat d. potential, kinetic
____ 22. Convert 75°C to degrees Fahrenheit.
a. 74°F b. 102°F c. 150°F d. 167°F
____ 23. Convert 500°F to degrees Celsius.
a. 260°C b. 296°C c. 842°C d. 958°C
____ 24. Convert 458 K to the equivalent Fahrenheit temperature.
a. 185°F b. 237°F c. 365°F d. 731°F
____ 25. Temperature is
a. associated with the sensation of hot and cold. b. proportional to the average kinetic energy of molecules.
c. measured with thermometers. d. All of the above
____ 26. The transfer of energy by the movement of fluids or gases with different temperatures is called
a. convection. b. conduction. c. contact. d. radiation.
____ 27. A sound wave in air has a frequency of 680 cycles per second. What is the approximate wavelength of the
sound wave?
a. 680 m b. 0.5 m c. 340 m d. 20 m
____ 28. The maximum displacement of a particle by a wave is called
a. amplitude. b. wavelength. c. frequency. d. period.
____ 29. The _____ is the distance between two crests of a wave.
a. amplitude b. wavelength c. frequency d. period
____ 30. The frequency of a sound wave determines
a. the pitch of the sound. b. how loud the sound is.
the compression.
c. how fast the sound travels.
d. the magnitude of
Mid Term Pre Assessment
Answer Section
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