Exam 4 Target 1 Retake Preap 16-17

5 Questions | Total Attempts: 56

SettingsSettingsSettings
Please wait...
Exam 4 Target 1 Retake Preap 16-17

.


Questions and Answers
  • 1. 
    A painter lifts a bucket of paint, carries it 5 m horizontally then sets it back down. Which of the following is true?
    • A. 

      A. The force of gravity does negative work when the worker lifts the bucket.

    • B. 

      B. The painter does positive work on the bucket when carrying it horizontally at constant speed.

    • C. 

      C. The painter does positive work on the bucket when setting it down.

  • 2. 
    If the sign of work is negative,
    • A. 

      A. the force is in the same direction as the displacement.

    • B. 

      B. the force is perpendicular to the displacement.

    • C. 

      C. the component of the force that does work is in the direction opposite the displacement.

    • D. 

      D. the component of the force that does work is perpendicular to the displacement.

  • 3. 
    A parachutist falls at a constant speed for 200 m. Which of the following is true?
    • A. 

      A. The force of gravity is the only force doing work on the parachutist.

    • B. 

      B. Air resistance is the only force doing work on the parachutist.

    • C. 

      C. No forces are doing work on the parachutist.

    • D. 

      D. No net work is done on the parachutist.

  • 4. 
    In which of the following sentences is work used in the scientific sense of the word?
    • A. 

      a. Holding a heavy box requires a lot of work.

    • B. 

      b. A scientist works on an experiment in the laboratory.

    • C. 

      c. Sam and Rachel pushed hard, but they could do no work on the car.

    • D. 

      d. John learned that shoveling snow is hard work.

  • 5. 
    Work is done when
    • A. 

      A. the displacement is not zero.

    • B. 

      B. the displacement is zero.

    • C. 

      C. the force is zero.

    • D. 

      D. the force and displacement are perpendicular.

Back to Top Back to top