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Simple harmonic motion-solutions

# Simple harmonic motion-solutions - le(txl65 Simple harmonic...

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le (txl65) – Simple harmonic motion – mohanty – (81440) 2 Initially the car (mass m ) has a speed v and therefore a kinetic energy of K i = 1 2 mv 2 ; after the collision, the car is at rest but the bumper, approximated by a spring, has a po- tential energy U spring . By conservation of energy, K i + U i = K f + U f 1 2 mv 2 = 1 2 kx 2 v = radicalbigg k m x = radicalBigg 7 . 5 × 10 6 N / m 820 kg (0 . 014 m) = 1 . 33891 m / s .
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