Get out of Shakespeare's room
 
 Shakespeare added force to the door so that the door can move to the direction of the force he added.
 Now I hope you understood about Shakespeare more. Although he is famous for literature, he is involved in physics very much!
 Now he went out of his house which is full of physics, but I suspect he is still involved in physics. He spent much more time involved in and thinking about physics than involved in literature. Then how come we call him poet instead of physicist?