Author Question: Two nonzero vectors have unequal magnitudes of X and Y. Which of the following could be the length ... (Read 62 times)

cool · **on:** Jul 28, 2018

Two nonzero vectors have unequal magnitudes of X and Y. Which of the following could be the length of their sum?

(i) 0
(ii) X+Y
(iii) X
(iv) Y

1.(ii) only
2.Any of them could be the length of the sum.
3.(i), (iii), and (iv)
4.(ii), (iii), and (iv)

Question 2

You drop a ball from a window on an upper floor of a building. It strikes the ground with speed v. You now repeat the drop, but you have a friend down on the street who throws another ball upward at speed v. Your friend throws the ball upward at exactly the same time that you drop yours from the window. At some location, the balls pass each other. Which of the following is true?
1.This location is below the halfway point between the window and the ground.
2.This location is at the halfway point between the window and the ground.
3.This location is above the halfway point between the window and the ground.
4.One cannot tell which of these choices is correct from the information given.