Exam 3 Preap Physics Numbers 11-15 2016

5 Questions | Total Attempts: 152

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Exam 3 Preap Physics Numbers 11-15 2016

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Questions and Answers
  • 1. 
    11.  When the net force acting on an object is 0 N, 
    • A. 

      A. the object’s motion changes.

    • B. 

      B. there are no forces acting on the object.

    • C. 

      C. the forces acting on the object are balanced.

    • D. 

      D. the forces acting on the object are unbalanced.

  • 2. 
    12. If a nonzero net force is acting on an object, then the object is definitely
    • A. 

      A. at rest.

    • B. 

      B. being accelerated.

    • C. 

      C. moving with a constant velocity.

    • D. 

      D. losing mass.

  • 3. 
    13. Which statement about the acceleration of an object is correct? (Hint:  Use the equation.)
    • A. 

      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. 

      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. 

      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. 

      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.

  • 4. 
    14.  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. 

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

    • B. 

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

    • C. 

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

    • D. 

      D. all of the above

  • 5. 
    15. In which situation is the net force acting on a car zero?
    • A. 

      A. The car increases speed and changes direction.

    • B. 

      B. The car increases speed but does not change direction.

    • C. 

      C. The car maintains its speed but changes direction.

    • D. 

      D. The car maintains both its speed and direction.

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