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  1. Assuming the system has no friction, it's a simple harmonic oscillator and therefore has constant mechanical energy. When the spring is fully stretched, all of that mechanical energy is spring potential E = PS E = ½kA²...

    2 Answers · Science & Mathematics · 28/05/2019

  2. At equilibrium position, there is no spring potential energy. E = 0.5mv^2 = 0.5*0.15*2.39^2 = 0.428 J

    2 Answers · Science & Mathematics · 28/05/2019

  3. During the time that the pebble is being launched, there are two forces on the pebble. The force exerted by the toy gun is the upward force. Its weight is the downward force. Let’s determine the work that is done...

    2 Answers · Science & Mathematics · 28/01/2019

  4. work done by friction = loss of KE µmgd = ½m(V² - v²) mass m cancels 0.0751 * 9.8m/s² * d = ½ * (3.18² - 2.00²)m²/s² solves to d = 4.15 m ◄ Hope this helps...

    1 Answers · Science & Mathematics · 02/07/2019

  5. Yes. r, r1 and r2 do not depend on time explicitly. Therefore the motion is conservative.

    2 Answers · Science & Mathematics · 23/02/2019

  6. Efficiency = 66.3% If it does 230 kJ of work, total energy = 347 kJ. Heat exhausted to atmosphere is the difference or 117 kJ

    0 Answers · Science & Mathematics · 29/01/2019

  7. u = <40, 0, 64> (initial velocity) a = <0, -8, -32> (you have a typing mistake) v(t) = <40 + 0*t, 0 + (-8)t, 64 + (-32)t> . . . .= <40, -8t, 64 – 32t> (agreed) Remember displacement (s) in a given direction is...

    1 Answers · Science & Mathematics · 07/09/2019

  8. Kinetic energy K = ½mv² = ½*1.24*0.542² = 0.18213 J...energy. ½k(x_max)² = Etot x_max = √[2*Etot /k] = √[2*0.84345/9.82] = 0.414m __________________ b.) What is the maximum...

    1 Answers · Science & Mathematics · 08/02/2019

  9. F = k x but the force is provided by buoyancy. So you need to find... by simplifying the fractions ) Now x = F/k ( from the first line) = 9.8 * 2 * 4.17 / 3 / 166 = 0.164 m and you should be...

    1 Answers · Science & Mathematics · 15/02/2019

  10. F = k * C[1] * C[2] / r^2 https://en.wikipedia.org/wiki/Coulomb...

    2 Answers · Science & Mathematics · 14/02/2019

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