Mr. Horton's Phat Physics Phinal Review 2013

Mr. Horton's Phat Physics Phinal Review 2013

____ 1. If a drag racer wins the final round of her race by going an average speed of 198.37 miles per hour in 4.537 seconds, what distance did he cover?

a. / 157,401 miles / c. / 0.2500 miles
b. / 2.500 miles / d. / 0.0121 miles

____ 2. What is the spring constant for a spring that stretches by 27 cm when a load of 200 N is suspended from it?

a. / 0.135 N/m / c. / 740 N/m
b. / 54 N/m / d. / 7.4 N/m

____ 3. If 320 J of work is done on a spring with a spring constant of 730 N/m, how far will it stretch?

a. / 0.58 m / c. / 0.61 m
b. / 0.87 m / d. / 0.94 m

____ 4. Which of the following does NOT represent Newton’s second law?

a. / a = m/F / c. / F = ma
b. / m = F/a / d. / a = F/m

____ 5. An inelastic collision is one in which

a. / kinetic energy before the collision equals kinetic energy after the collision.
b. / kinetic energy after the collision is zero.
c. / kinetic energy before the collision is less than kinetic energy after the collision.
d. / kinetic energy before the collision is greater than kinetic energy after the collision.

____ 6. What is the period of a pendulum near Earth’s surface that is 130 cm long?

a. / 2.3 s / c. / 9.1 s
b. / 0.83 s / d. / 22.9 s

____ 7. The magnitude of a vector represents its _____.

a. / velocity / c. / size
b. / direction / d. / color

____ 8. Construct a position-time graph that shows the forward progress of Sunny The Dog in a straight line for 20 meters over the course of 4 seconds.

a. / / c. /
b. / / d. /

____ 9. If the period of a certain wave (wavelength = 4.5 m) is 2 seconds, what is the speed of the wave?

a. / 0.44 m/s / c. / 9.0 m/s
b. / 1.1 m/s / d. / 2.3 m/s

____ 10. Which of the following is a pair of scalar quantities?

a. / velocity - distance / c. / time - speed
b. / velocity - displacement / d. / time - displacement

____ 11. In the diagram, the wavelength is shown by:

a. / a / c. / c
b. / b / d. / d

____ 12. In the diagram, the trough of the wave is shown by:

a. / a / c. / c
b. / b / d. / d

____ 13. In the diagram, the amplitude of the wave is shown by:

a. / a / c. / c
b. / b / d. / d

____ 14. In the diagram, the crest of the wave is shown by:

a. / a / c. / c
b. / b / d. / d

____ 15. Which conditions will result in the smallest change in momentum?

a. / a large force over a long time period / c. / a small force over a long time period
b. / a large force over a short time period / d. / a small force over a short time period

____ 16. The normal force (FN) refers to

a. / the parallel contact force exerted by a surface on another object.
b. / the perpendicular contact force exerted by a surface on another object.
c. / the perpendicular tension exerted by a surface on a rope.
d. / the parallel acceleration of a body at terminal velocity.

____ 17. Assuming constant velocities, if a fastball pitch is thrown and travels at 40 m/s toward home plate, 18 m away, and the head of the bat is simultaneously traveling toward the ball at 18.0 m/s, how much time elapses before the bat hits the ball?

a. / About 0.3 s / c. / About 0.9 s
b. / About 0.6 s / d. / About 1.2 s

____ 18. A weight is hung from the ceiling of an elevator by a massless string. Under which circumstances will the tension in the cord be the smallest?

a. / The elevator is at rest.
b. / The elevator rises with increasing speed.
c. / The elevator descends with decreasing speed.
d. / The elevator descends with increasing speed.

____ 19. A rocket leaves a launch pad at liftoff with a great deal of upward momentum. What was initially given downward momentum?

a. / the launch pad / c. / the expelled fuel
b. / the astronauts aboard the rocket / d. / the entire Earth

____ 20. The path of a projectile through space is called its:

a. / equilibrant / c. / range
b. / torque / d. / trajectory

____ 21. Which is not an example of resonance?

a. / a basketball is dribbled down the court
b. / a car bumper bounces back after a collision
c. / a child swings higher as she is pushed on a swing
d. / a guitar string is repeatedly plucked

____ 22. The brightness of a light source sensed by the human eye depends only on the total luminous flux incident on the eye.

____ 23. Which is increased when the string of a stringed instrument is tightened?

a. / timbre / c. / wavelength
b. / pitch / d. / loudness

____ 24. Which two notes are not an octave apart?

a. / 256 Hz and 512 Hz / c. / 331 Hz and 622 Hz
b. / 262 Hz and 524 Hz / d. / 277 Hz and 554 Hz

____ 25. The rate at which an object’s velocity changes is called its _____.

a. / acceleration / c. / displacement
b. / average velocity / d. / scalar magnitude

____ 26. A spring (k = 790 N/m) has a length of 48 cm when zero net force is applied to it. What will its length be when 230 N of force is applied to stretch it?

a. / 3.4 m / c. / 3.9 m
b. / 0.77 m / d. / 0.29 m

____ 27. A point on a wave completes one cycle every 5 seconds. The frequency of this wave is 1/5 seconds.

____ 28. A soldier throws a grenade horizontally from the top of a cliff. Which of the following curves best describes the path taken by the grenade?

a. / Circle / c. / Hyperbola
b. / Ellipse / d. / Parabola

____ 29. Which of the following is a pair of vector quantities?

a. / Speed — Distance / c. / Velocity — Displacement
b. / Velocity — Distance / d. / Speed — Displacement

____ 30. To determine the y-component of a projectile’s velocity, what operation is performed on the angle of the launch?

a. / secant / c. / cosine
b. / tangent / d. / sine

____ 31. The speed is represented by

a. / the ratio of the change of position to the time interval during the change.
b. / the absolute value of the slope of a position-time graph.
c. / the instantaneous velocity.
d. / the time interval.

____ 32. An object that is shot through the air is called a

a. / protractor. / c. / parabola.
b. / projectile. / d. / proboscis.

____ 33. Analyze the collision of a baseball with a bat. During which portion of the collision does the baseball’s velocity reach zero?

a. / before the collision
b. / during the collision
c. / one second after the collision
d. / one-hundredth of a second after the collision

____ 34. A light source moving toward an observer will appear to be at a higher frequency than its actual frequency.

____ 35. Tapping the surface of a pan of water generates 17.5 waves per second. If the wavelength of each wave is 45 cm, what is the speed of the waves?

a. / 7.9 m/s / c. / 39 m/s
b. / 790 m/s / d. / 2.6 m/s

____ 36. A weight is hung from the ceiling of an elevator by a massless string. Under which circumstances will the tension in the cord be the greatest?

a. / The elevator rises with decreasing speed.
b. / The elevator rises with increasing speed.
c. / The elevator is at rest.
d. / The elevator descends with increasing speed.

____ 37. The final position minus the initial position is the

a. / average velocity. / c. / time interval.
b. / motion diagram. / d. / displacement.

____ 38. What is the correct definition of momentum, p =

a. / ma / c. / mv
b. / mv2 / d. / mc2

____ 39. What is the proper unit for gravitational potential energy?

a. / gravitons / c. / Cruton’s
b. / joules / d. / Hammer heads

____ 40. Which formula represents final velocity of an object with average acceleration?

a. / vi = vf + aDt / c. / vf = vi aDt
b. / vf = vi aDt / d. / vf = vi + aDt

____ 41. If wavelength is kept constant, which increases as the speed of a wave increases?

a. / period / c. / amplitude
b. / frequency / d. / phase

____ 42. Which shows the correct angle of reflection given the incident ray shown?

a. / / c. /
b. / / d. /

____ 43. Force and acceleration are related in a linear fashion.

____ 44. Given a graph of velocity v. time, what does a horizontal line represent?

a. / The object’s acceleration is positive. / c. / The object’s acceleration is negative.
b. / The object is moving at constant velocity. / d. / The object is standing still.

____ 45. An object that has negative acceleration is definitely doing what?

a. / speeding up
b. / maintaining a constant speed
c. / slowing down
d. / accelerating in a direction that is opposite to a stated positive direction.

____ 46. Which type of energy is associated with a body’s height above the ground?

a. / thermal energy / c. / gravitational potential energy
b. / elastic potential energy / d. / rest energy

____ 47. Tension refers to

a. / the force exerted by a string. / c. / dynamic displacement.
b. / terminal velocity. / d. / free fall.

____ 48. Which material is likely to experience a highly inelastic collision?

a. / a steel ball on a steel plate
b. / a car with compressed springs in its bumper
c. / a lump of clay
d. / a baseball thrown against a trampoline

____ 49. Which of the following is NOT an example of accelerated motion?

a. / a boulder falling off of a cliff in a straight path
b. / an airplane taking off down a straight runway
c. / a bicyclist moving in a straight line at constant speed
d. / a ball being thrown straight up

____ 50. The example of a book falling off of a table shows a(n) _____.

a. / contact force / c. / absence of acceleration
b. / scalar quantity / d. / field force

____ 51. The unit for frequency is Hertz, or cycles per second.

____ 52. The acceleration due to Earth’s gravity is:

a. / 9.8 m/s2 / c. / 9.8 ft/s2
b. / 98 m/s2 / d. / 9.8 mi/s2

____ 53. Which of the following is not true about a free body diagram?

a. / All forces point away from the particle.
b. / The arrows are proportional to the size of the forces.
c. / The system is represented by a particle model.
d. / You always know the magnitude of the forces ahead of time.

____ 54. The law of conservation of momentum states that the momentum of a closed, isolated system does not change.

____ 55. A racehorse is running with a uniform speed of 69 km/hr along a straightaway. What is the time it takes for the horse to cover 400 meters?

a. / 21 seconds / c. / 0.35 hours
b. / 2.1 minutes / d. / 27.6 hours

____ 56. Analyze the graph. Which quantity is equal to the impulse?

a. / The area around the football field / c. / The size of an elephants shoe
b. / distance along curve / d. / area under the curve

____ 57. “ FA on B = -FB on A” is an expression of

a. / Horton’s first law / c. / Newton’s third law
b. / Newton’s second law / d. / Fig Newton’s law

____ 58. Which characteristic of sound is associated with frequency?

a. / pitch / c. / pressure
b. / loudness / d. / timbre

____ 59. The change in velocity during a measurable time interval, divided by the time interval, is the _____.

a. / instantaneous velocity / c. / instantaneous acceleration
b. / average velocity / d. / average acceleration

____ 60. The path through space followed by a projectile is called the

a. / trajectory. / c. / thrust.
b. / transparency. / d. / acceleration due to gravity.

____ 61. A pendulum clock is taken to the moon (g = 1.6 m/s2). How long must the pendulum be in order for the clock to continue keeping accurate time (1 second/cycle)?

a. / 3.2 m / c. / 0.25 m
b. / 7.9 m / d. / 0.041 m

____ 62. A force cannot exist without an agent and a system.

____ 63. Duplain St. is 300 m long and runs from west to east between Baron and Burkey. If Keith is strolling east from Baron at an average velocity of 3 km/hr, and Sue is power-walking west from Burkey at an average velocity of 6 km/hr, how long will it take them to meet?

a. / 1 minute / c. / 3 minutes
b. / 2 minutes / d. / 6 minutes

____ 64. How much work must be done on a spring (k = 730 N/m) to stretch is by 1.5 m?

a. / 821 J / c. / 1643 J
b. / 548 J / d. / 649 J

____ 65. A grandfather clock keeps time using a pendulum. Which will be true of the clock if the pendulum is shortened?

a. / It will run slow. / c. / It will keep the same time.
b. / It will run fast. / d. / It will depend on the bob’s mass.

____ 66. To determine the x-component of a projectile’s velocity, what operation is performed on the angle of the launch?

a. / secant / c. / cosine
b. / tangent / d. / sine

____ 67. When an object is in equilibrium, the net force is _____.

a. / zero / c. / negative
b. / positive / d. / changing

____ 68. A closed-pipe resonator can produce sounds that have wavelengths that are four times the length of the pipe.

____ 69. In a free body diagram, the force arrows always point _____.

a. / away from the particle / c. / both toward and away from the particle
b. / toward the particle / d. / at right angles to each other

____ 70. What is the formula to find speed of light?

a. / c = l/f / c. / c = f/l
b. / c = lf / d. / l2/f

____ 71. Which of the following system of forces provides the block the highest net force?

a. / 11 N 71 N / c. / 227 N 153 N
b. / 405 N 403 N / d. / 22.7 N 15.3 N

____ 72. When the drag force on an object falling through the air equals the force of gravity, the object has reached

a. / terminal force. / c. / terminal illness.
b. / terminal acceleration. / d. / terminal velocity.

____ 73. An elastic collision is one in which

a. / kinetic energy before the collision equals kinetic energy after the collision.
b. / kinetic energy after the collision is zero.
c. / kinetic energy before the collision is less than kinetic energy after the collision.
d. / kinetic energy before the collision is greater than kinetic energy after the collision.

____ 74. The instantaneous acceleration of an object is