Question

Physics: Please Help

Answer 1

is given below.

Step-by-step explanation:

• In the first question, we made a choice to determine how many vectors that have the horizontal component. The logic is simple. If a vector is not on the y-axis respectively, it has to have any horizontal component.
• 
  `d_1` and
  `d_3` have the same vertical component on y-axis.
• Vectors have both magnitude and direction.
• We used a right triangle to determine the magnitude of displacement vector by applying Pythagorean Theorem which is
  `a²+b²=c²`.
• The last one is shown in diagram.