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AaronAndyson

  • one year ago

6.4kJ of energy causes a displacement of 64m in a body in the direction of force in 2.5s.Calculate 1.The force applied. 2.Power in HP. Take 1 HP = 746W

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  1. AaronAndyson
    • one year ago
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    @Abhisar @TorilovesVampires

  2. TorilovesVampires
    • one year ago
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    W = K.E = 6.4 kJ = 6.4 x 103 J W = F.d. cos θ Now the displacement of the body is in the direction of applied force. θ = 0 W = F.d F = W/d = (6.4 x 103 J)/64 m F = 100 N Power P = W/t = (6.4 x 103 J)/(2.5) =16 x 103 W =1.6 x 104 W = (1.6 x 104) / 746 = 0.0021 x 104 H.P. Power P = 21 H.P.

  3. AaronAndyson
    • one year ago
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    ???

  4. Abhisar
    • one year ago
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    Yo, wassup?

  5. AaronAndyson
    • one year ago
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    I'm confused. Shouldn't the F be 10.3?

  6. Abhisar
    • one year ago
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    Work = Force x Displacement and this work done will be equal to energy supplied, Right?

  7. AaronAndyson
    • one year ago
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    Yes.

  8. Abhisar
    • one year ago
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    Let the applied force be F, then 6400 = F x 64. Now you can calculate the force.

  9. AaronAndyson
    • one year ago
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    100N

  10. Abhisar
    • one year ago
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    You got it ;)

  11. AaronAndyson
    • one year ago
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    And the P?

  12. Abhisar
    • one year ago
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    \(\sf Power = \frac{Work/Energy}{Time}\) You know the work, you know the time. Just plug in the values and find power.

  13. AaronAndyson
    • one year ago
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    64000/25?

  14. AaronAndyson
    • one year ago
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    2560 W?

  15. Abhisar
    • one year ago
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    6.4 KJ = 6400 J

  16. Abhisar
    • one year ago
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    Power = 6400/25

  17. AaronAndyson
    • one year ago
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    Time is 2.5 s not 25s

  18. Abhisar
    • one year ago
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    Right, then it's correct!

  19. Abhisar
    • one year ago
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    Finally, convert the power into HP. 1 HP =746 Watts.

  20. AaronAndyson
    • one year ago
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    3.43?

  21. Abhisar
    • one year ago
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    That's right!

  22. AaronAndyson
    • one year ago
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    Thanks @Abhisar and @TorilovesVampires both.

  23. Abhisar
    • one year ago
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    pleasure is all mine c:

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