need help with 8 easy physic problems?

Question

i know all this problems are easy but i am having hard time with my physic because i dont' understand physic,so plz help me as much as you can 1 or 2 is better than nothing =]

1.when representing velocity as a vector?
2.in order to find the components of a vector,you should....?
3.which of the following would not be considered a projectile?
4.the horizontal component of a projectile's velocity is independents of.....?
5.in the absence of air friction,the vertical component of a projectile's velocity doesn't change as the projectile moves?
6.in the absence of air friction, the horizontal component of a projectile's velocity doesn't change as the projectile moves..is true or some time true or alway false?
7.which best approximates the resultant of a pair of 10 unit vectors at right angles to each other?
8.when in orbit,a satellite like the space shuttle is....?

Answer 1

1. velocity is always a vector! Speed is a scalar
2. in order to find the components of a vector, you should learn.
Let V be the vector and A the angle with x-axis, then

Vx= V cos(A)
Vy= V sin(A)

Please do your home work.

Answer 2

I dont know what school you go to, but my grade 12 physics class sounds easier than this 8th grade problem haha