MCAS Power Practice

5 Questions | Total Attempts: 252

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MCAS Power Practice

High school MCAS questions about POWER from released Introductory Physics practice exams.


Questions and Answers
  • 1. 
    The motor of one car is more powerful than the motor of another car. Which of the following must be true of the more powerful motor?
    • A. 

      It can do work more quickly

    • B. 

      It can operate for a longer time

    • C. 

      It can burn fuel more efficiently

    • D. 

      It can store more potential energy

  • 2. 
    A crane lifts two 100 kg loads of building materials to the top of a building under construction. The first load is lifted in 10 s and the second load is lifted in 13 s. Which of the following statements BEST compares the work and power expended by the crane lifting the two loads?
    • A. 

      The crane does more work and expends more power for the first lift.

    • B. 

      The crane does the same work and expends the same power for each lift.

    • C. 

      The crane does the same work for each lift but expends more power for the first lift.

    • D. 

      The crane does more work in the second lift but expends the same power for each lift.

  • 3. 
    Two students each carry a box up to the third floor of a building. The total mass of each student and the box she is carrying is the same. Roberta makes the trip in 45 s while Mary takes 30 s. Which of the following statements BEST describes this task?
    • A. 

      Roberta does more total work than Mary

    • B. 

      Mary does more total work than Roberta

    • C. 

      Roberta has greater power output than Mary

    • D. 

      Mary has a greater power output than Roberta

  • 4. 
    A man ran on a treadmill for 1800 seconds. At the end of his run, the treadmill indicated his energy output as 240,000 J. What average power did he generate?
    • A. 

      666 W

    • B. 

      133 W

    • C. 

      66 W

    • D. 

      7 W

  • 5. 
    At a weightlifting competition, two competitors lifted the same weight to the same height. The second competitor accomplished the lift 2 seconds faster than the first competitor. This demonstrated that the second competitor had more
    • A. 

      Energy than the first

    • B. 

      Inertia than the first

    • C. 

      Power than the first

    • D. 

      Work than the first