Respuesta :

nb32193

Answer:

D, A

Explanation:
  • PE=KE according to law of conservation of energy
  • mgh=1/2mv²
  • gh=1/2v²
  • v²=2gh
  • v²=2(10)(50)
  • v²=1000
  • v=10√10m/s²=31.6m/s²

#1

Height is same for all cars

So they all will arrive at same speed but A will come first

Option D

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