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Physics Help. A rescue plane flying horizontally at 250 km/hr wants to drop supplies to...?
Physics Help. A rescue plane flying horizontally at 250 km/hr wants to drop supplies to stranded hikers...?
a) A rescue plane flying horizontally at 250 km/hr wants to drop supplies to stranded hikers on a ridge 200 m below the plane. How far in advance of the position of the hikers must the supplies be dropped?
b) If the supplies are released 400 m in advance of the position of the hikers, what vertical velocity must they be given to land at the hikers' position?
ANSWERS:
a) 443.7 m
b) 6.50 m/s downward
1 Answer
- ?Lv 71 decade agoFavorite Answer
a) t = √(2y/g) = 6.389 sec; V = 250/3.6 = 69.44 m/s
....D = V*t = 443.67 m
b) t = 400/69.44 = 5.76 sec; y = Vi*t + ½g*t² → -200 = Vi*5.76 + ½g*5.76²
Vi = -6.50 m/s
