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Question

OK, so there was another question in the PSLE Science paper which I have drawn out again. Many people say that the amount of force needed is the same since the same amount of gravity is acting on the doors, but I think it’s that the girl needs to use more force since it is against gravity. Can someone tell me whether I’m correct?

Answer

I think neither of your answers are right.

  1. Person B is using less force because she is pushing WITH gravity.
  2. They are not using the same force because one is pushing WITH gravity and the other is pushing AGAINST gravity.
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