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Q4. A loaded truck with a total mass of 6 tonne has four wheels each of mass 250 kg, diameter 400 mm and radius of gyration 300 mm. The truck Is travelling at 2 m/s when it starts to descend an incline of 3°. The incline is 150 m long and resistance to motion is constant at 450 N.

Calculate EACH of the following:

(a) the energy lost in descending the incline. (2)

(b) the speed of the truck at the bottom of the incline. (14)