A block of mass 1.0 kg rests on a trolley of mass 4.0 kg. The coefficient of dynamic friction betwee

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International Baccalaureate | Solutions | Previous Year Questions | Question Bank | IB SL & HL A block of mass 1.0 kg rests on a trolley of mass 4.0 kg. The coefficient of dynamic friction between the block and the trolley is 0.30.

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Why does the mass of the block not affect the acceleration of the trolley if they are one system? To clarify my question, in the final step, why do we only the mass of the trolley (4kg) and not add the mass of the block (1kg) as well?

frantot
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shouln't we also considered the mass of the block while considering the mass of the trolley?

xuning
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So the 5N force is not used anywhere? It doesn’t matter?

colinotheboss
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kareem
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shouln't we also considered the mass of the block while considering the mass of the trolley?

tigranbagdasaryan