A 20-kg block is placed on top of a 50-kg block as shown in figure. An horizontal force F acting ...

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A 20-kg block is placed on top of a 50-kg block as shown in figure. An horizontal force F acting on A causes an acceleration of 3  ms^-2 to A and 2  ms^-2 to B as shown in the figure. For this situation, mark out the correct statement(s).
(1) The friction force between A and B is 40  N.
(2) The net force acting on A is 150  N.
(3) The value of F is 190  N.
(4) The value of F is 150  N.

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