A participant in a winter sporting event pulls a 43 kg brick of ice in the positive horizontal direction with a cable over his shoulders over' a frozen lake as shown in the figure. Assume the coefficients of static and kinetic friction are µs=0.1 and µk=0.03. a.) Calculate the minimum force F he must exert to get the brick sliding in newtons.  b.) What is its acceleration in m/s2 once it starts to move, if that force is maintained?

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