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If a constant F of (3a3b2c⁻²)2 Newtons moves an object of a distance D equivalent to (2a2b⁻³c2)3 metres, find the work done in metric?

Mathematics

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Answer

72a12b−5c2 Newton-metres\text{}\mathbf{72a^{12}b^{-5}c^2}\text{ Newton-metres}

Step-by-step solution

4 steps

Here's how to find the work done using the given force and distance.

  1. State the formula for work done

    Work done (WW) is calculated as the product of force (FF) and distance (DD).

    W=F×DW = F \times D
  2. Simplify the expression for Force (FF)

    The given force is F=(3a3b2c−2)2F = (3a^3b^2c^{-2})^2 Newtons.
    To simplify, apply the power rule (xy)n=xnyn(xy)^n = x^n y^n and (xm)n=xmn(x^m)^n = x^{mn}:

    F=32⋅(a3)2⋅(b2)2⋅(c−2)2F = 3^2 \cdot (a^3)^2 \cdot (b^2)^2 \cdot (c^{-2})^2 F=9⋅a3×2⋅b2×2⋅c−2×2F = 9 \cdot a^{3 \times 2} \cdot b^{2 \times 2} \cdot c^{-2 \times 2} F=9a6b4c−4 NewtonsF = 9a^6b^4c^{-4} \text{ Newtons}
  3. Simplify the expression for Distance (DD)

    The given distance is D=(2a2b−3c2)3D = (2a^2b^{-3}c^2)^3 metres.
    To simplify, apply the power rule (xy)n=xnyn(xy)^n = x^n y^n and (xm)n=xmn(x^m)^n = x^{mn}:

    D=23⋅(a2)3⋅(b−3)3⋅(c2)3D = 2^3 \cdot (a^2)^3 \cdot (b^{-3})^3 \cdot (c^2)^3 D=8⋅a2×3⋅b−3×3⋅c2×3D = 8 \cdot a^{2 \times 3} \cdot b^{-3 \times 3} \cdot c^{2 \times 3} D=8a6b−9c6 metresD = 8a^6b^{-9}c^6 \text{ metres}
  4. Calculate the Work Done (WW)

    Now, multiply the simplified force and distance expressions:

    W=(9a6b4c−4)×(8a6b−9c6)W = (9a^6b^4c^{-4}) \times (8a^6b^{-9}c^6)

    Multiply the numerical coefficients:

    W=(9×8)⋅(a6⋅a6)⋅(b4⋅b−9)⋅(c−4⋅c6)W = (9 \times 8) \cdot (a^6 \cdot a^6) \cdot (b^4 \cdot b^{-9}) \cdot (c^{-4} \cdot c^6)

    Apply the exponent rule xm⋅xn=xm+nx^m \cdot x^n = x^{m+n}:

    W=72⋅a6+6⋅b4+(−9)⋅c−4+6W = 72 \cdot a^{6+6} \cdot b^{4+(-9)} \cdot c^{-4+6} W=72⋅a12⋅b4−9⋅c2W = 72 \cdot a^{12} \cdot b^{4-9} \cdot c^{2} W=72a12b−5c2 Newton-metresW = 72a^{12}b^{-5}c^2 \text{ Newton-metres}

    The work done is 72a12b−5c2 Newton-metres\text{}\mathbf{72a^{12}b^{-5}c^2}\text{ Newton-metres}

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