Question

The triangle is right triangle which three sides are a, Squareroot 3a, and 2a, the angle corresponding To 2a is its right angle (90 degree), find the angle corresponding to a, find the angle Corresponding to Squareroot 3a. A speed of 7 mu m/ns is equal to 7000 m/s 70 m/s 7 m/s 0.07 m/s An airplane is going to lading, its touchdown velocity, V_0 = 72.5 m/s, t_0 = 0, then it starts to apply brake and use reverse thrust of engine, by doing these, the airplane obtain the deceleration of a = 4.27 m/s. When if fully stops, v_f = 0, what is the braking distance? And how long it takes the airplane fully stop?

Answer 1

here,

2)

the sides are a , sqrt(3) * a and 2 a

the angle corresponding to a , theta1 = arcsin(a/2a)

theta1 = 30 degree

and the some of all angles of a triangle is 180 degree

the angle corresponding to sqrt(3) * a , theta2 = 180 - 90 - theta1

theta2 = 60 dgeree