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Pls i never get help for physics :P What is the force with which the ground pushes the 50kg mass?

Physics
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i worked out acceleration is 1.53ms^-2 left and Force is 76.6N
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Other answers:

w=50(9.81)=490.5N \[\sum F_y=0 \\ \\ n+Fsin(40)-w=0 \\ \\ n=490.5-100\sin(40) \\ \\ n=426N\]
they are saying " the force with which the ground pushes the 50kg mass" so the force which you're gonna find is the normal force
thank you :)

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