Monday, February 9, 2009

Forces

We discussed forces in class today. Mr. Lim gave us a question to chew on: If there is an object of weight 1N on the ground, and a force of 1 N is applied to lift it, will the object be able to be lifted into the air? My theory is that it will not be lifted. This is because there is an equal force acting on both sides of the object, namely, upwards lift and downwards weight. Hence, the object will not move.


Take this picture as an example. The four forces are acting on it with equal strength. Hence, the box does not move. If you look at FN and Fg, they are the two forces we are focusing on. The box is neither moving up nor down, hence the equal forces have no effect on it and the box is not being lifted.

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