# physics

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A nurse pushes a cart by exerting a force on the handle at a downward angle 35.0º below the horizontal. The loaded cart has a mass of 28.0 kg, and the force of friction is 60.0 N. (a) Draw a free-body diagram for the system of interest. (b) What force must the nurse exert to move at a constant velocity?

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sd

• physics -

Fnet-Ff=ma
a=0
Fnet=Ff
Ff=Fnetcos(35)
Fnet=Ff/cos(35)
Fnet= 73N

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