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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 = ½

**k**A²...2 Answers · Science & Mathematics · 28/05/2019

When compressed, stored energy = ½

**k**x² = ½(4500)(2.1)² = 9922.5 J When roc**k**projected above energy will be given to the roc**k**as**k**inetic energy. ie Kinetic energy of roc**k**= 9922.5 J If it...3 Answers · Science & Mathematics · 25/11/2019

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

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**k**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

1/R= 1/r1 +1/r2 ie., 1/38= 1/56+ 1/r2 Solving you get r2 = 118 kilo ohm.

1 Answers · Science & Mathematics · 05/02/2020

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

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

u = <40, 0, 64> (initial velocity) a = <0, -8, -32> (you have a typing mista

**k**e) 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

**k**Q^2 / d^2 = m g Q = sqrt( m g d^2 /**k**)1 Answers · Science & Mathematics · 01/05/2019

168ºC = 441

**K**(a) KE for both molecules is the same: KE = (3/2...1 Answers · Science & Mathematics · 15/11/2019

L = Lo*(1+

**k***ΔT) L = 120*(1+17*10^-6*(24-21)) = 120.006 mm lenght increases by 6 μm1 Answers · Science & Mathematics · 20/10/2019