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7 Տասնյակը հաստատուն a = 0,5 մ/վ² տանձնեցինք արագացումով կատարում է կորաչափած արծում։ Գտնել նրա լրիվ արագությունը այն պահին, երբ արագությունը 2 մ/վ է, իսկ կորության առավելագույնը 3 մ է։ Պատ. a = 1,42 մ/վ²

Physics

ScanSolve AI Answer

Answer

a=1.42 m/s2a = 1.42 \text{ m/s}^2

Step-by-step solution

3 steps
  1. Identify the given values.

    The problem states that the tangential acceleration aτa_{\tau} is 0.5 m/s20.5 \text{ m/s}^2.
    The speed vv of the particle is 2 m/s2 \text{ m/s}.
    The radius of curvature RR of the path is 3 m3 \text{ m}.

  2. Calculate the normal (centripetal) acceleration ana_n.

    The normal acceleration is responsible for changing the direction of the velocity and is given by the formula:

    an=v2Ra_n = \frac{v^2}{R}

    Substitute the given values:

    an=(2 m/s)23 m=4 m2/s23 m=43 m/s2a_n = \frac{(2 \text{ m/s})^2}{3 \text{ m}} = \frac{4 \text{ m}^2/\text{s}^2}{3 \text{ m}} = \frac{4}{3} \text{ m/s}^2 an≈1.333 m/s2a_n \approx 1.333 \text{ m/s}^2
  3. Calculate the total acceleration aa.

    The total acceleration is the vector sum of the tangential acceleration aτa_{\tau} and the normal acceleration ana_n. Since these two components are perpendicular to each other, the magnitude of the total acceleration is found using the Pythagorean theorem:

    a=aτ2+an2a = \sqrt{a_{\tau}^2 + a_n^2}

    Substitute the values of aτa_{\tau} and ana_n:

    a=(0.5 m/s2)2+(43 m/s2)2a = \sqrt{(0.5 \text{ m/s}^2)^2 + \left(\frac{4}{3} \text{ m/s}^2\right)^2} a=0.25 m2/s4+169 m2/s4a = \sqrt{0.25 \text{ m}^2/\text{s}^4 + \frac{16}{9} \text{ m}^2/\text{s}^4} a=0.25+1.777... m/s2a = \sqrt{0.25 + 1.777...} \text{ m/s}^2 a=2.0277... m/s2a = \sqrt{2.0277...} \text{ m/s}^2 a≈1.424 m/s2a \approx 1.424 \text{ m/s}^2

    Rounding to two decimal places, we get:

    a=1.42 m/s2a = 1.42 \text{ m/s}^2
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