Contribute correction: Physics I

 ______     _____     _____    _    _   
|      \\  |  ___||  /  ___|| | || | || 
|  --  //  | ||__   | // __   | || | || 
|  --  \\  | ||__   | \\_\ || | \\_/ || 
|______//  |_____||  \____//   \____//  
`------`   `-----`    `---`     `---`