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



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AonZ
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dw:1363676611270:dw

AonZ
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i worked out acceleration is 1.53ms^2 left
and
Force is 76.6N

.Sam.
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dw:1363679086031:dw

.Sam.
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w=50(9.81)=490.5N
\[\sum F_y=0 \\ \\ n+Fsin(40)w=0 \\ \\ n=490.5100\sin(40) \\ \\ n=426N\]

.Sam.
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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

AonZ
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thank you :)