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9 April, 17:50

B. A locomotive of a train exerts a constant force of 280KN on a train while pulling

it at 50 km/h along a level track. What is:

[4 marks)

i. Workdone in quarter an hour and

[4 marks]

+3
Answers (1)
  1. 9 April, 21:25
    0
    Work-done in quarter an hour = 3.5 * 10⁶ J

    Explanation:

    Given:

    Force (F) = 280 KN = 280,000 N

    Velocity (V) = 50 km / h

    Time (t) = 1 / 4 = 0.25 hour

    Find:

    Work-done in quarter an hour

    Computation:

    ⇒ Displacement = Velocity (V) * Time

    ⇒ Displacement = 50 * 0.25

    ⇒ Displacement = 12.5 km

    ⇒ Work-done = Force (F) * Displacement

    ⇒ Work-done in quarter an hour = 280,000 * 12.5

    ⇒ Work-done in quarter an hour = 3,500,000

    Work-done in quarter an hour = 3.5 * 10⁶ J
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