Test Bank Physics Principles with Applications 7th Edition Giancoli By

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Test Bank Physics Principles with Applications 7th Edition Giancoli By

Exam Name___________________________________

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

  1. 1)  Consider a deer that runs from point A to point B. The distance the deer runs can be greater than 1) the magnitude of its displacement, but the magnitude of the displacement can never be greater
    than the distance it runs.

    A) True B) False

  2. 2)  Which of the following quantities has units of a displacement? (There could be more than one 2) correct choice.)

    A) 186,000 mi
    B) 32 ft/s2 vertically downward

    C) 9.8 m/s2 D) -120 m/s

    E) 40 km southwest

  3. 3)  Suppose that an object travels from one point in space to another. Make a comparison between the 3) magnitude of the displacement and the distance traveled by this object.

    A) The displacement can be either greater than, smaller than, or equal to the distance traveled. B) The displacement is always equal to the distance traveled.

    C) The displacement is either less than or equal to the distance traveled.
    D) The displacement is either greater than or equal to the distance traveled.

  4. 4)  Consider a car that travels between points A and B. The car’s average speed can be greater than 4) the magnitude of its average velocity, but the magnitude of its average velocity can never be
    greater than its average speed.

    A) True B) False

  5. 5)  Which of the following quantities has units of a velocity? (There could be more than one correct 5) choice.)

    A) 186,000 mi
    B) 9.8 m/s downward

    C) 9.8 m/s2 downward D) 40 km southwest

    E) -120 m/s

  6. 6)  When is the average velocity of an object equal to the instantaneous velocity? 6) A) never

    B) when the velocity is constant
    C) only when the velocity is increasing at a constant rate D) only when the velocity is decreasing at a constant rate

    E) always

1

  1. 7)  You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed over the 12 7) km drive will be

    A) less than 70 km/h.
    B) greater than 70 km/h.

    C) equal to 70 km/h. D) exactly 38 km/h.

    E) It cannot be determined from the information given because we must also know directions traveled.

  2. 8)  If the velocity of an object is zero at some point, then its acceleration must also be zero at that 8) point.

A) True B) False

9) Which of the following situations is impossible?
A) An object has constant non-zero acceleration and changing velocity.

B) An object has zero velocity but non-zero acceleration.
C) An object has constant non-zero velocity and changing acceleration. D) An object has velocity directed east and acceleration directed west.

E) An object has velocity directed east and acceleration directed east.

9)

  1. 10)  If the acceleration of an object is zero, then that object cannot be moving. 10) A) True B) False
  2. 11)  If the velocity of an object is zero, then that object cannot be accelerating. 11) A) True B) False
  3. 12)  Suppose that a car traveling to the west begins to slow down as it approaches a traffic light. Which 12) of the following statements about its acceleration is correct?

    A) Since the car is slowing down, its acceleration must be negative. B) The acceleration is toward the east.

    C) The acceleration is toward the west. D) The acceleration is zero.

  4. 13)  An auto manufacturer advertises that their car can go “from zero to sixty in eight seconds.” This is 13) a description of what characteristic of the car’s motion?

    A) instantaneous speed B) average acceleration

    C) average speed D) displacement

    E) instantaneous acceleration

  5. 14)  An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the 14) object

    A) is increasing its velocity by 2.0 m/s every second. B) travels 2.0 m in every second.

    C) is decreasing its velocity by 2.0 m/s every second. D) is traveling at 2.0 m/s.

2

  1. 15)  Suppose that a car traveling to the east (+x direction) begins to slow down as it approaches a traffic 15) light. Which statement concerning its acceleration must be correct?

    A) Its acceleration is decreasing in magnitude as the car slows down. B) Its acceleration is in the -x direction.

    C) Its acceleration is zero.
    D) Its acceleration is in the +x direction.

  2. 16)  Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a 16) traffic light. Which statement concerning its acceleration must be correct?

    A) Its acceleration is zero.
    B) Its acceleration is positive.

    C) Its acceleration is negative.
    D) Its acceleration is decreasing in magnitude as the car slows down.

  3. 17)  Suppose that an object is moving with a constant velocity. Which statement concerning its 17) acceleration must be correct?

    A) The acceleration is constantly increasing. B) The acceleration is equal to zero.

    C) The acceleration is constantly decreasing.
    D) The acceleration is a constant non-zero value.

  4. 18)  If the velocity of an object is zero at one instant, what is true about the acceleration of that object? 18) (There could be more than one correct choice.)

    A) The acceleration could be negative. B) The acceleration could be zero. C) The acceleration could be positive. D) The acceleration must be zero.

  5. 19)  Under what condition is average velocity equal to the average of the object’s initial and final 19) velocity?

    A) The acceleration is constant.
    B) The acceleration must be constantly decreasing.

    C) This can only occur if there is no acceleration. D) This can occur only when the velocity is zero.

    E) The acceleration must be constantly increasing.

  6. 20)  A racing car accelerates uniformly from rest along a straight track. This track has markers spaced 20) at equal distances along it from the start, as shown in the figure. The car reaches a speed of 140
    km/h as it passes marker 2.

    Where on the track was the car when it was traveling at half this speed, that is at 70 km/h? A) At marker 1

    B) Before marker 1
    C) Between marker 1 and marker 2

3

  1. 21)  When a ball is thrown straight up with no air resistance, the acceleration at its highest point 21) A) reverses from upward to downward

    B) is downward
    C) is upward
    D) reverses from downward to upward

    E) is zero

  2. 22)  A rock from a volcanic eruption is launched straight up into the air with no appreciable air 22) resistance. Which one of the following statements about this rock while it is in the air is correct?

    A) On the way up, its acceleration is downward and its velocity is upward, and at the highest point both its velocity and acceleration are zero.

    1. B)  On the way down, both its velocity and acceleration are downward, and at the highest point both its velocity and acceleration are zero.
    2. C)  The acceleration is downward at all points in the motion.
    3. D)  The acceleration is downward at all points in the motion except that is zero at the highest

      point.

    4. E)  Throughout the motion, the acceleration is downward, and the velocity is always in the same

      direction as the acceleration.

  3. 23)  Suppose a ball is thrown straight up and experiences no appreciable air resistance. What is its 23) acceleration just before it reaches its highest point?

    A) exactly g B) slightly greater than g C) zero D) slightly less than g

  4. 24)  A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of the 24) following statements about the direction of the velocity and acceleration of the ball as it is going up
    is correct?

    A) Both its velocity and its acceleration point upward.
    B) Its velocity points downward and its acceleration points upward. C) Its velocity points upward and its acceleration points downward.

    D) Both its velocity and its acceleration points downward.

  5. 25)  A ball is thrown downward in the absence of air resistance. After it has been released, which 25) statement(s) concerning its acceleration is correct? (There could be more than one correct choice.)

    A) Its acceleration is constant. B) Its acceleration is zero.

    C) Its acceleration is constantly decreasing. D) Its acceleration is greater than g.

    E) Its acceleration is constantly increasing.

  6. 26)  A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed v0 and experience 26)

    no significant air resistance. If the 10-kg rock reaches a maximum height h, what maximum height will the 20-kg ball reach?

    A) h B) h/2 C) 4h D) h/4 E) 2h

  7. 27)  A 10-kg rock and 20-kg rock are dropped from the same height and experience no significant air 27) resistance. If it takes the 20-kg rock a time T to reach the ground, what time will it take the 10-kg

rock to reach the ground?
A) T/2 B) 4T C) T

D) T/4 E) 2T

4

  1. 28)  A 10-kg rock and a 20-kg rock are dropped at the same time and experience no significant air 28) resistance. If the 10-kg rock falls with acceleration a, what is the acceleration of the 20-kg rock?

    A) 4a B) a C) a/4 D) a/2 E) 2a

  2. 29)  Two objects are dropped from a bridge, an interval of 1.0 s apart. Air resistance is negligible. 29) During the time that both objects continue to fall, their separation

    A) stays constant. B) increases.

    C) decreases at first, but then stays constant. D) decreases.

    E) increases at first, but then stays constant.

  3. 30)  From the edge of a roof top you toss a green ball upwards with initial speed v0 and a blue ball 30)

    downwards with the same initial speed. Air resistance is negligible. When they reach the ground below

    A) the green ball will be moving faster than the blue ball. B) the two balls will have the same speed.

    C) the blue ball will be moving faster than the green ball.

  4. 31)  Ball A is dropped from the top of a building. One second later, ball B is dropped from the same 31) building. Neglect air resistance. As time progresses, the difference in their speeds

    A) remains constant. B) increases.

    C) decreases.
    D) cannot be determined from the information given.

  5. 32)  Two objects are thrown from the top of a tall building. One is thrown up, and the other is thrown 32) down, both with the same initial speed. What are their speeds when they hit the street? Neglect air resistance.

    A) They are traveling at the same speed.
    B) The one thrown down is traveling faster.

    C) The one thrown up is traveling faster.
    D) It is impossible to tell because the height of the building is not given.

  6. 33)  Brick A is dropped from the top of a building. Brick B is thrown straight down from the same 33) building, and neither one experiences appreciable air resistance. Which statement about their accelerations is correct?

    A) The acceleration of B is greater than the acceleration of A. B) The two bricks have exactly the same acceleration.

    C) Neither brick has any acceleration once it is released.
    D) The acceleration of A is greater than the acceleration of B.

  7. 34)  An object is moving with constant non-zero velocity in the +x direction. The position versus time 34) graph of this object is

    A) a horizontal straight line. B) a vertical straight line.

    C) a straight line making an angle with the time axis. D) a parabolic curve.

5

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