Asked by Taha
A drone capable of flying north at a speed of 4.0 m/s in still air is attempting to fly across a field 120 m wide. There is a wind blowing at 5.0 m/s [E].
a) Find the drone's velocity relative to the ground.
b) Find the time it takes the drone to cross the field.
a) Find the drone's velocity relative to the ground.
b) Find the time it takes the drone to cross the field.
Answers
Answered by
John
I cant tell if ur srs or not? This seems like some taliban stuff
Answered by
Henry
X = 5m/s. = Vw.
Y = 4 m/s = Vd.
a. Tan A = Y/X = 4/5 = 0.8, A = 38.7o. N. of E. = 51.3o E. of N.
Vr = X/Cos A=5/Cos38.7=6.4 m/s[38.7o] = Resultant drone velocity.
b. d = 120/sin38.7 = 192 m. To cross the
field.
V*t = 192, 4*t = 192, t = 48 s.
Y = 4 m/s = Vd.
a. Tan A = Y/X = 4/5 = 0.8, A = 38.7o. N. of E. = 51.3o E. of N.
Vr = X/Cos A=5/Cos38.7=6.4 m/s[38.7o] = Resultant drone velocity.
b. d = 120/sin38.7 = 192 m. To cross the
field.
V*t = 192, 4*t = 192, t = 48 s.
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