Exam 3 Quiz 4

10 Questions | Total Attempts: 177

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Exam 3 Quiz 4

Questions and Answers
  • 1. 
    A newton is equivalent to which of the following quantities?
    • A. 

      Kg

    • B. 

      Kg•m/s^2

    • C. 

      Kg•m/s

    • D. 

      Kg•(m/s)^2

  • 2. 
    Which statement about the acceleration of an object is correct?
    • A. 

      The acceleration of an object is directly proportional to the net external force acting on the object and inversely proportional to the mass of the object.

    • B. 

      The acceleration of an object is directly proportional to the net external force acting on the object and directly proportional to the mass of the object.

    • C. 

      The acceleration of an object is inversely proportional to the net external force acting on the object and inversely proportional to the mass of the object.

    • D. 

      The acceleration of an object is inversely proportional to the net external force acting on the object and directly proportional to the mass of the object.

  • 3. 
    A truck and a car uniformly accelerate from rest to a velocity of 3.0 m/s in equal time intervals. The truck is ten times as massive as the car. Which of the following statements is correct?
    • A. 

      The acceleration of the truck is 1/10 that of the car.

    • B. 

      The truck travels 1/10 the distance of the car.

    • C. 

      The force on the truck is 10 times the force on the car.

    • D. 

      All of the above

  • 4. 
    In which situation is the net force acting on a car zero?
    • A. 

      The car increases speed and changes direction.

    • B. 

      The car increases speed but does not change direction.

    • C. 

      The car maintains its speed but changes direction.

    • D. 

      The car maintains both its speed and direction.

  • 5. 
    Which are simultaneous equal but opposite forces resulting from the interaction of two objects?
    • A. 

      Net external forces

    • B. 

      Gravitational forces

    • C. 

      Field forces

    • D. 

      Action-reaction pairs

  • 6. 
    Newton’s third law of motion involves the interactions of
    • A. 

      One object and one force

    • B. 

      Two objects and one force.

    • C. 

      One object and two forces

    • D. 

      Two objects and two forces.

  • 7. 
    A hammer drives a nail into a piece of wood. Identify an action-reaction pair in this situation.
    • A. 

      The nail exerts a force on the hammer; the hammer exerts a force on the wood.

    • B. 

      The hammer exerts a force on the nail; the wood exerts a force on the nail.

    • C. 

      The hammer exerts a force on the nail; the nail exerts a force on the hammer.

    • D. 

      The hammer exerts a force on the nail; the hammer exerts a force on the wood.

  • 8. 
    A batter strikes a baseball with a bat. Identify an action-reaction pair and describe the forces exerted by each.
    • A. 

      The batter exerts a force on the bat; the ball exerts a force on the bat

    • B. 

      The batter exerts a force on the bat; the bat exerts a force on the batter.

    • C. 

      The bat exerts a force on the batter; the bat exerts a force on the ball.

    • D. 

      The ball exerts a force on the bat; the bat exerts a force on the batter.

  • 9. 
    Two students reach for a jar of mustard at the same time. One student pulls to the left with a force of 13.2 N, while the other student pulls to the right with a force of 12.9 N. If the jar has a net acceleration of 0.44 m/s2 to the left, what is the mass of the jar?
    • A. 

      0.13 kg

    • B. 

      11.48 kg

    • C. 

      0.68 kg

    • D. 

      59.32 kg

  • 10. 
    A certain cable of an elevator is designed to exert a force of 4.5 ´ 104 N. If the maximum acceleration that a loaded car can withstand is 3.5 m/s2 (the current fastest elevators in the world undergo an acceleration of less than 3.2 m/s2), what is the combined mass of the car and its contents?
    • A. 

      12,857 kg

    • B. 

      14,063 kg

    • C. 

      157,500 kg

    • D. 

      144,000 kg

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