I need help with A and B ust49wa.theexpertta.com at the equator the radius of th

Question

I need help with A and B

ust49wa.theexpertta.com at the equator the radius of the earth is approximately 6370 - Google Search The Expert TA I Human-like Grading, Automated! (33%) Problem 2: At the equator, the radius of the Earth is approximately 6370 km. A plane flies at a very low altitude at a constant speed of v = 211 m/s. Upon landing, the plane can produce an average deceleration of a = 20.5 m/s landing strijp nt Status ere for d view ©theexpert ta.com 50% Part (a) How long will it take the plane, in seconds, to circle the Earth at the equator? ining Grade Summary Deductions t = | 18959.051 20% 80% Status | T| ( 7 89 HOME sinO) cotanasin0 atanacotan sinhO cosh0 tanh cotanhO tan() acos) Submissions Attempts remaining: 4 (20% per attempt) detailed view Completed Partial 20% END °Degrees Radians BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 10% deduction per hint. Hints remaining: 3 Feedback: 10% deduction per feedback. 50% Part (b) What is the numeric value for the minimum landing distance, d (in meters), this plane needs to come to rest? Assume that when the plane touches the ground it is moving at the same speed as it was when it was flying

Explanation / Answer

Solution :-

r = 6370*10^3 m

v = 211 m/s

a) Time taken to circle the Earth :-

t = (2*pi*r)/v

t = (2*3.14*(6370*10^3))/ 211

t = 189590.52 Sec.

b) Landing Distance d is :-

=> V^2 -V1^2 = 2*a*d

=> (0)^2 - (211)^2 = 2*(-20.5)*d

=> -44521 = -41*d

=> d = -44521 / -41

=> d = 1085.88 m

Minimum Landing Distance is 1085.88 m

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