Asked by Millie
                Jean dangles her watch from a thin piece of string while the jetliner she is in takes off. She notices that the string makes an angle of 22° with respect to the vertical while the aircraft accelerates for takeoff, which takes about 18 seconds. Estimate the takeoff speed of the aircraft.
            
            
        Answers
                    Answered by
            bobpursley
            
    tan22=ma/mg= a/g
a= g tan22
You know acceleration.
vf= at you know a, time t.
    
a= g tan22
You know acceleration.
vf= at you know a, time t.
                    Answered by
            Millie
            
    I keep getting Vf= 1.56 m/s which webassign says is wrong. It's in the chapter about Newtons laws of motion so, even though it is not included in the question, could that have a bearing on my answer, and if so how?
    
                    Answered by
            bobpursley
            
    It would help if you put your calculator in degrees, and worked with 22 degrees, not 22 radians.   Goodness.
    
                    Answered by
            Millie
            
    oh, thank you. I forgot to do that after my calc homework
    
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