Amajor force opposing the motion of a vehicle is the rolling resistance of the tires, fr, given by fr f w where f is a constant called the rolling resistance coefficient and w is the vehicle weight. determine the power, in kw, required to overcome rolling resistance for a truck weighing 322.5 kn that is moving at 110 km/h. let f 5 0.0069

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?