H2P-49
Conservation of energy
H2 Physics · JC 1 · Medium · Conservation of energy
A roller coaster car of mass 500 kg passes point X at 8.0 m s⁻¹, where X is 12 m above the lowest point Y of the track. It then climbs to point Z, which is 20 m above Y. Neglect resistive forces and take . What is the speed of the car at Z?
- The car cannot reach Z; its speed there is 0 m s⁻¹
- 4.0 m s⁻¹
- 9.8 m s⁻¹
- 16 m s⁻¹
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