If a train going 60 m/s hits the brakes, and it takes the train 1 minute 30 seconds to stop, what is the train's acceleration?

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?