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19. A boy with a mass of 30 kg pulls a cart with a mass of 100 kg towards himself by a rope. With what

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19. A boy with a mass of 30 kg pulls a cart with a mass of 100 kg towards himself by a rope. With what force does he have to pull on the rope to accelerate the cart at 2.0 mfsz? With what force must his feet push on the ground to keep him from moving towards the cart? If there is no friction between his feet and the ground, what is his acceleration

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