- A 250 g pine derby car rolls down a frictionless ramp from the starting height of 0.75 m. How fast is the car moving as it
exits the ramp?

They coasters are in tear-drop form because of physics. if the ride was in a complete circle, how would the coaster get into the loop, let alone get out of the loop? also, the reason why most coasters are in tear-drop form is because of acceleration. the steeper the turn, the faster the ride.

The awnser is  erosion for your question