Grade 11 Physics Quiz
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A 500 kg500\ \text{kg} roller-coaster car moves at 5.0 m/s5.0\ \text{m/s} at a point 20.0 m20.0\ \text{m} above the ground. It later reaches a horizontal section 5.0 m5.0\ \text{m} above the ground and compresses a spring until it stops. Friction transfers 50,000 J50{,}000\ \text{J} of mechanical energy to thermal energy. The spring constant is 20,000 N/m20{,}000\ \text{N/m}. Use g=9.8 m/s2g=9.8\ \text{m/s}^2.
How far is the spring compressed?
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