Kristina demonstrates a toy for her younger brother. the steps to operate the toy are listed below. step 1. push the toy down. step 2. a spring compresses. step 3. release the toy. step 4. the toy jumps into the air. which best describes step 4? a. elastic potential energy changes to gravitational potential energy. b. gravitational potential energy changes to elastic potential energy. c. kristina does work to increase the gravitational potential energy. d. kristina does work to increase the elastic potential energy.

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?