Physics Principles with Applications 7th Edition Giancoli By Test Bank

Exam Name___________________________________

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

1. 1)  In a collision between a huge SUV and a small hybrid car, the SUV exerts a larger force on the 1) hybrid than the hybrid exerts on the SUV.

   A) True B) False

   C) It depends on whether the collision is a head-on collision or a rear-end collision.

2. 2)  A box is placed on a table which rests on the floor. The box pushes on the table; the reaction force 2) to the box’s push on the table is the table’s push on the floor.

   A) True B) False

3. 3)  In order to get an object moving, you must push harder on it than it pushes back on you. 3) A) True B) False
4. 4)  A girl attaches a rock to a string, which she then swings counter-clockwise in a horizontal circle. 4) The string breaks at point P in the figure, which shows a bird’s-eye view (as seen from above).
   Which path (A-E) will the rock follow?

A) Path A B) Path B C) Path C D) Path D E) Path E

5) If you pound a feather with a hammer, which one feels a greater force? A) always the hammer

B) If the feather moves, then it felt the greater force. Otherwise the force was the same on both. C) always the feather
D) The size of the force is always exactly the same on both of them.

5)

6. 6)  A satellite is in orbit around the earth. Which one feels the greater force? 6) A) the earth because the satellite has so little mass

   B) Earth and the satellite feel exactly the same force.
   C) It depends on the distance of the satellite from Earth. D) the satellite because the earth is so much more massive

7. 7)  You pull on a crate with a rope. If the crate moves, the rope’s pull on the crate must have been 7) larger than the crate’s pull on the rope, but if the crate does not move, both of these pulls must

have been equal. A) True

B) False

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8. 8)  In order to lift a bucket of concrete, you must pull up harder on the bucket than the bucket pulls 8) down on you.

   A) True B) False

9. 9)  If the rockets of a spaceship in outer space (far from all gravity) suddenly lose power and go off, 9) the spaceship will gradually slow to a stop.

   A) True B) False

10. 10)  You are in a train traveling on a horizontal track and notice that a piece of luggage starts to slide 10) directly toward the front of the train. From this observation, you can conclude that this train is

    A) slowing down.
    B) slowing down and changing direction.

    C) changing direction. D) speeding up.

    E) speeding up and changing direction.

11. 11)  While flying horizontally in an airplane, you notice that a string dangling from the overhead 11) luggage compartment hangs at rest at 15° away from the vertical toward the front of the plane.
    Using this observation, you can conclude that the airplane is

    A) not accelerating because the string is at rest. B) accelerating forward.

    C) accelerating backward. D) moving backward.

    E) moving forward.

12. 12)  An elevator suspended by a vertical cable is moving downward but slowing down. The tension in 12) the cable must be

    A) equal to the weight of the elevator.
    B) less than than the weight of the elevator.

    C) greater than the weight of the elevator.

13. 13)  A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s. The vector sum of all the 13) forces acting on this crate must point

    A) up the ramp.
    B) vertically downward.

    C) perpendicular to the ramp. D) down the ramp.

    E) None of the above choices is correct.

14. 14)  A bucket is being lowered by a very light rope with a constant downward velocity. The tension in 14) the rope must be

    A) less than the weight of the bucket.
    B) greater than the weight of the bucket.

    C) equal to the weight of the bucket.

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15. 15)  Bill and his daughter Susan are both standing on identical skateboards (with really good 15) frictionless ball bearings), initially at rest. Bill weighs three times as much as Susan. Bill pushes horizontally on Susan’s back, causing Susan to start moving away from Bill. Just after Bill stops
    pushing,

    A) Susan and Bill are moving away from each other, with equal speeds.
    B) Susan and Bill are moving away from each other, and Susan’s speed is one-third that of Bill.

    C) Susan and Bill are moving away from each other, and Susan’s speed is three times that of Bill.

    D) Susan is moving away from Bill, and Bill is stationary.

16. 16)  You push on box G that is next to box H, causing both boxes to slide along the floor, as shown in the 16) figure. The reaction force to your push is

    A) thepushofboxHonboxG. B) the acceleration of box G.

    C) the push of box G against you. D) thepushofboxGonboxH.

    E) the upward force of the floor n box G.

17. 17)  A small car and a large SUV are at a stoplight. The car has a mass equal to half that of the SUV, 17) and the SUV can produce a maximum accelerating force equal to twice that of the car. When the
    light turns green, both drivers push their accelerators to the floor at the same time. Which vehicle
    pulls ahead of the other vehicle after a few seconds?

    A) It is a tie. B) The car pulls ahead. C) The SUV pulls ahead.