Final answer:
The work done by the truck engine during the 1-hour period is 3.528×109 joules (J), calculated by multiplying the constant force of 28,000 N and the distance traveled, which is 126,000 m.
Step-by-step explanation:
The question is about calculating the work done by a truck engine during a 1-hour period while traveling at a constant speed and supplying a constant force. The formula to calculate work is Work = Force × Distance. Here, the force supplied by the truck engine is 28 kN (which is 28,000 N) and the truck travels at a constant speed of 35 m/s over a 1-hour period. First, we convert the 1 hour into seconds (1 hour = 3600 seconds) and then determine the distance traveled in that time period by multiplying the speed by the time (Distance = Speed × Time).
Distance = 35 m/s × 3600 s = 126,000 m
The next step is to calculate the work done using the formula:
Work = Force × Distance = 28,000 N × 126,000 m = 3,528,000,000 J
Therefore, the work done by the truck engine during the 1-hour period is 3.528×109 joules (J).