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A particle of mass 2 kg is moving in the direction of positive x-axis. Initial velocity of the particle is 1 m/s. The instantaneous power vs time graph of the particle is shown in the figure. Find the velocity of the particle at 7 seconds.

Option 1 -

5 m/s

Option 2 -

5.5 m/s

Option 3 -

6 m/s

Option 4 -

7 m/s

0 2 Views | Posted 3 weeks ago
Asked by Shiksha User

  • 1 Answer

  • V

    Answered by

    Vishal Baghel | Contributor-Level 10

    3 weeks ago
    Correct Option - 3


    Detailed Solution:

    ΔW = area under P — t graph
    = (1/2) (4 + 6) × 7 = 35 J
    Work done = change in KE ⇒ 35 = (1/2) × 2 × v² - (1/2) × 2 × (1)² ⇒ v = 6 m/s

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