A loaded truck of mass 3000 kg moves on a level roadat a constant speed of 6.000 m/s. The frictional force on the truckfrom the road is 1000 N. Assume that air drag is negligible. (a)How much work is done by the truck engine in 10.00 min? (b) After10.00 min, the truck enters a hilly region whose inclinationis30∘and continues to move with the same speed for another 10.00min. What is the total work done by the engine during that periodagainst the gravitational force and the frictional force? (c) Whatis the total work done by the engine in the full 20 min?
