ANSWER: speed = 5
work = 450
EXPLANATION:
Before starting to figure out this equation we must get rid of all the unneeded information. Here is a problem, Lucas is carrying his rock collection into class. He carries 30 pounds of rare rocks 15 feet into Classroom 6. It takes him 3 minutes to get them into the classroom. What is Lucas's speed and how much work is done? The unneeded information is highlighted. Now we can begin! First we must figure out Lucas speed. The equation for speed is,
Speed = distance / time. The distance is 15 feet and the time is 3 minutes. 15 / 3 = 5. Now we must figure out how much work is done. The equation for work is: Work = force x distance. The force in this equation is 30 lb And the distance is 15 ft. 30 x 15 = 450