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