Refer to the following information for the next three questions.
Part 1. Initial measurements
Refer to the following information for the next three questions.
Part 2: Initial Calculations
Using the properties of vertical circular motion, calculate the critical velocity, in m/sec, needed by the car to travel around the looptheloop without losing contact with the track. Show your calculations. 
Using conservation of energy calculate the ideal height, in meters, from which the car should be released so that it will successfully complete the looptheloop. Show your calculations. 
Refer to the following information for the next two questions.
Now increase the height of the track by small intervals (1 to 2 cm) checking to see if the car successfully completes the looptheloop. Record your results in the table below.
description of behavior

intial height (cm) 
ending height (cm) 
Refer to the following information for the next three questions.
Part 4: Conclusions