A plane flying at 70.0 m/s suddenly stalls.If the acceleration during the stall is 9.8 m/s² directly downward,the stall lasts 5.0 s,and the plane was originally climbing at 25° to the horizontal,what is the velocity after the stall? A)66 m/s at -17° B)66 m/s at +17° C)80 m/s at -37° D)80 m/s at +37°

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Quizplus · Accepted Answer

The initial velocity components are 70 m/s * cos(25°) horizontally and 70 m/s * sin(25°) vertically. After 5 seconds of downward acceleration, the vertical velocity component changes by 9.8 m/s² * 5 s. Calculating the final velocity components and using trigonometry gives a resultant velocity of 66 m/s at an angle of -17° to the horizontal.

A Plane Flying at 70