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Exercício de Questão de fisica
Exercício:
Uma montanha russa está passando por teste com um carrinho de 120 kg. Uma parte da pista é um looping vertical de raio 12 m. Na parte mais baixa (A) do looping a velocidade do carrinho é 25m/s e na parte mais alta (B) é de 8 m/s. Quanto trabalho é realizado pela força de “ATRITO” quando o carrinho vai do ponto A ao ponto B?
A) -16875 J
B) -5400 J
C) -2700 J
D) -10800 J
E) 5400 J
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