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expeople1 [14]
2 years ago
9

A Boeing 747 "Jumbo Jet" has a length of 59.7 m. The runway on which the plane lands intersects another runway. The width of the

intersection is 25.0 m. The plane decelerates through the intersection at a rate of 5.4 m/s2 and clears it with a final speed of 53 m/s. How much time is needed for the plane to clear the intersection?
Physics
1 answer:
tia_tia [17]2 years ago
5 0

Answer:

t = 1.48 s

Explanation:

As we know that length of the Boeing plane is

L = 59.7 m

width of the intersection is given as

w = 25.0 m

now we know that deceleration of the plane is given as

a = -5.4 m/s^2

Also the final speed of the plane while it clears the intersection is given as

v_f = 53 m/s

now we have

d = (\frac{v_f + v_i}{2}) t

(25 + 59.7) = (\frac{53 + v_i}{2}) t

also we know that

v_f - v_i = at

53 - v_i = -5.4 t

now we have

84.7 = (\frac{53 + 53 + 5.4t}{2})t

by solving above equation we have

t = 1.48 s

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