A3.0kg block slides down an incline that makes an angle θ = 30◦ with the horizontal direction. the coefficient of kinetic friction between the block and the incline is µk = 0.3 if the incline is 3m long, (i) determine the work done by friction. (ii) determine the work done by the normal force. (iii) determine the work done by gravity. (iv) what is the total work done on the block? (v) if the block is given an