An ostrich lays the largest bird egg. A typical diameter for an ostrich egg so its widest part is 12 cm. Suppose an egg of this size rolls down a slope
so that the centripetal acceleration of the shell at its widest part is 0.28
m/s. What is the tangential speed of that part of the shell?

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?