Determine whether the objects in the following problems have kinetic or potential energy (if potential specify either elastic or gravitational) and then calculate it.
KE = 12 mv2 KE = (0.5)(mass)(velocity2)
PEgrav = mgh PEgrav = (mass)(9.8 m/s2)(height)
PEElastic = 12 kx2 PEElastic = (0.5)(spring constant)(how far object is stretched/compressed)

1. A baby carriage is sitting on top of a hill that is 12 meter high. The carriage with baby has a mass of 2.2 kg.
Potential
2. A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg.
Kenetic
3. Mr. Hearth is launched from a cannon at a speed of 30 m/s and his mass is 74 kg.
Kenetic
4. A cat is stuck in a tree. The cat weighs 14.7 Newtons. The tree is 10 meters high.
Potential

Two researchers are attempting to create a new psychotherapy protocol that more reduces panic attacks. they believe that they have succeeded and are now in the clinical trial period of their protocol's development. they are working with several cohort groups, some of which have been through the new protocol, while others have done the standard protocol currently recommended. if these researchers are interested in evaluating the difference in the percentage of test subjects who successfully decreased their panic attacks in 2 months on the new protocol versus the percentage of test subjects who successfully decreased their panic attacks in 2 months with the traditional protocol, which of the following statistical tests would be most appropriate? a. analysis of variance (anova) b. correlation c. chi-square test d. paired t-test e. independent t-test