Projectiles: 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° below the horizontal B) 66 m/s at 17° above the horizontal C) 80 m/s at 37° below the horizontal D) 80 m/s at 37° above the horizontal

Question

Quizplus · Accepted Answer

The plane's initial velocity has a horizontal component of 70.0 m/s * cos 25° = 63.6 m/s and a vertical component of 70.0 m/s * sin 25° = 29.3 m/s. During the stall, the horizontal component of velocity remains constant, while the vertical component changes by -9.8 m/s^2 * 5.0 s = -49.0 m/s. Therefore, the velocity after the stall is 63.6 m/s at 17° below the horizontal.

Projectiles: a Plane Flying at 70