Explanation:
Let
and 
The sum of the two vectors is


The difference between the two vectors can be written as


Answer:
First of all the formula is F= uR,( force= static friction× reaction)
mass= 5+25=30
F= 50
R= mg(30×10)=300
u= ?
F=UR
u= F/R
u= 50/300=0.17N
Answer: C) divide: distance ÷ velocity
Explanation:
The velocity
equation is distance
divided by time
:

If we isolate
we will have:

Hence, the correct option is C: distance divided by velocity.
Answer:
X: Always attractive
Y: Infinite range
Z: Attractive or repulsive
ANSWER IS C
Contour lines are lines that signifies the elevation on a mountain or hill