A roller coaster at Cedar point is at the top of the first drop (100 M). the car with all of it’s passengers weighs 1100 KG. what is the potential energy of the car what is the fastest that car can go on the coaster (V)?

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

In the first law of thermodynamics, triangle e=q-w, what does q stand for

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?