Chapter 4. Newton's first law of motion (4-6)

Question

oVDUrbcqrxj7BBYD98XFAJoK5MAa7Hoiocw/p1bzTfm+Sss2NL/sTwWAVa/LWmX3CmXgAA==

{"title":"If the net external force on an object is zero..","description":"Correct!","type":"correct","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"37,4,51,31\"}]"} {"title":"...the object does not accelerate...","description":"Wrong","type":"incorrect","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"118,11,119,13\"},{\"shape\":\"rect\",\"coords\":\"130,6,150,31\"}]"} {"title":"...and the velocity of the object remains constant. If the object is at rest, it remains at rest; if it is in motion, it continues in motion in a straight line at a constant speed.","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"poly\",\"coords\":\"113,132\"},{\"shape\":\"rect\",\"coords\":\"208,6,223,26\"}]"}

Question

ab1BS91bTTL4vCr6GpKOastL4IDEDvSe/BZD0tzrrxwmX7SScxpfAw==

{"title":"If the net external force on an object is zero..","description":"Wrong","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"37,4,51,31\"}]"} {"title":"...the object does not accelerate...","description":"Correct!","type":"correct","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"118,11,119,13\"},{\"shape\":\"rect\",\"coords\":\"130,6,150,31\"}]"} {"title":"...and the velocity of the object remains constant. If the object is at rest, it remains at rest; if it is in motion, it continues in motion in a straight line at a constant speed.","description":"Incorrect","type":"incorrect","color":"#333300","code":"[{\"shape\":\"poly\",\"coords\":\"113,132\"},{\"shape\":\"rect\",\"coords\":\"208,6,223,26\"}]"}

Question

wOOT+cKlFjYu0Mu0oly3kgm30tOQx6FYOGa9G2lTMWN6pjfBO7eNWdMl1r/6Wi4wv+yfCP/joIa2eyQMgros2AHxuA1Le13qoSpmqt/IvKMnt38sKsWP13jMNAgHTbPJgWcad+RTFfj3NznpHIxt5A11YIjVLNbQ+lOA0KXtWowJIi01y5Woe4xIRfwv0uqK9Q+9jKGsxzkgSQb99nrgvULOMcWb407RLAZjJn3RP2fbCFFHWDi7Ow==

{"title":"If the net external force on an object is zero..","description":"Wrong","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"37,4,51,31\"}]"} {"title":"...the object does not accelerate...","description":"Wrong","type":"incorrect","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"118,11,119,13\"},{\"shape\":\"rect\",\"coords\":\"130,6,150,31\"}]"} {"title":"...and the velocity of the object remains constant. If the object is at rest, it remains at rest; if it is in motion, it continues in motion in a straight line at a constant speed.","description":"Correct!","type":"correct","color":"#333300","code":"[{\"shape\":\"poly\",\"coords\":\"113,132\"},{\"shape\":\"rect\",\"coords\":\"208,6,223,26\"}]"}

Review

You can think of Newton’s first law as a special case of the \(\textbf{second}\) law that applies when the net force on an object is zero. We’ll nonetheless call these laws “first” and “second” in the same manner in which Newton numbered them. In equation form, we can write the first law as follows: