Work, energy and power

Work, energy and power Quiz

Spec 2.1 · Edexcel A-Level Further Maths: Quiz

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  1. 1. A 33 kg object moves at 44 m s−1^{-1}. What is its kinetic energy?

    • A. 2424 J
    • B. 1212 J
    • C. 4848 J
    • D. 66 J

  2. 2. A force of 500500 N drives a vehicle at a constant 1212 m s−1^{-1}. What is the power?

    • A. 41.741.7 W
    • B. 512512 W
    • C. 60006000 W
    • D. 488488 W

  3. 3. A ball is dropped from rest from 2020 m (no air resistance, g=9.8g=9.8). What is its speed on reaching the ground?

    • A. 14.014.0 m s−1^{-1}
    • B. 19.819.8 m s−1^{-1}
    • C. 392392 m s−1^{-1}
    • D. 9.99.9 m s−1^{-1}

  4. 4. A 1010 kg box is pulled 44 m up a smooth slope inclined at 30∘30^\circ at constant speed. What work is done against gravity?

    • A. 392392 J
    • B. 339339 J
    • C. 9898 J
    • D. 196196 J

  5. 5. A car's engine has power 3030 kW and the resistance is a constant 750750 N. What is the maximum speed on a level road?

    • A. 2525 m s−1^{-1}
    • B. 22.522.5 m s−1^{-1}
    • C. 4040 m s−1^{-1}
    • D. 0.0250.025 m s−1^{-1}

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