Plane A is flying 430 mph in the northest direction relative to the earth, Plane
ID: 1429616 • Letter: P
Question
Plane A is flying 430 mph in the northest direction relative to the earth, Plane B is flying at 500 mph in the north direction relative to the earth. What is the speed pf Plane B as observed from Plane A? 532 mph 860 mph 362 mph 659 mph 669 mph Your friend takes a multi-vitamin every day because her doctor told her it was good for her. Which source of knowledge is she relying on? Authority Intuition Sensory data Reason If the principle of Time Symmetry is true, which of the following must also be true? The laws of nature will be the same 100 years from now must be they are today. The models of physics used by scientists 1000 years from now must be the same as they are today. The world would appear unchanged if the direction of time were reversed. The plants and animals, the mountains and streams which we observe a million years from now will look almost identical to those we see today. Uniform motion is undetectable. Two identical encyclopedias are dropped. Encyclopedia A is dropped from 5 feet off the ground and Encyclopedia B is dropped from 10 feet off the ground. Encyclopedia B is dropped first. When Encyclopedia B reaches exactly 5 feet above the ground, Encyclopedia A is dropped. Which encyclopedia has the greater force and thus the greater acceleration acting on it? Which encyclopedia hits the ground first? Which encyclopedia is travelling faster when it hits? Both encyclopedia A's and B's covers hit the ground face down. Does Encyclopedia A or Encyclopedia B exerts the greater force on the ground?Explanation / Answer
Vae = 430 * cos(45) i^ + 430 * sin(45) j^
Vbe = 500 j^
Vba = Vbe + Vea
Vba = 500 j^ - 430 * cos(45) i^ - 430 * sin(45) j^
Vba = - 304.1 i^ + 195.9 j^
|Vba| = sqrt(304.1^2 + 195.9^2)
|Vba| = 361.7 mph
Velocity of Plane B wrt Plane A, |Vba| = 362 mph
Correct Option - (C)
Please post seperate questions in seperate post only.