1 Warm-up Questions a) A plane is flying 42.0° west of north at a speed of 525 k

Question

1 Warm-up Questions a) A plane is flying 42.0° west of north at a speed of 525 kph. What is the the plane's velocity ö in terms of components (using the usual geographical coordinates: +r to the east, and +y to the north)? u- b) A shell is shot out of a cannon, as shown. In the typical horizontal/vertical coordinates (+ to the right, +y vertically upward), the shell's inital r-velocity is-440 m/s, and its ini- tal y-velocity is 220 m/s. What was the shell's inital speed v, and at what angle above the horizontal was it shot? 0:

Explanation / Answer

Q:1

y component = 525 kph cos 42= 390.15 kph

x component = 525 kph sin42 = -351.29 kph

Q: 2

Initial speed = sqroot ( x^2+ y^2) = 491.934 m/s

angle = tan^-1 ( 220/440)= -26.565 degree or 26.565 degree from - x axis

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