A 1500 kilogram railroad car is moving with a velocity of 4.0 meters per second in a direction that is 20° north of east.
In the diagram below, starting from point P, draw a vector
that represents the railroad car's momentum using a scale
of 1.0 centimeter = 2.0 x 10 kilogram-meter per second.

Why should seat belts not be mandatory quick plz

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline

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?