1. A 10.0-kg mass has a potential energy of 10.0 J when it is at what height?
2. A 10.0-lb weight has a potential energy of 20.0 ft lb at what height?
3. At what speed does a 1.00-kg mass have a kinetic energy of 1.00 J?
4. At what speed does a 10.0-N weight have a kinetic energy of 1.00 J?