Answer:
Angle = Ф = (0) = 0
Hence, it is proved that angle between position vector r and acceleration vector a = 0 and is it never changes.
Step-by-step explanation:
Given vector r(t) =
As we know that,
velocity vector = v =
Implies that
velocity vector =
As acceleration is velocity over time so:
acceleration vector = a =
Implies that
vector a =
vector a =
Now scalar product of position vector r and acceleration vector a:
r. a =
r.a =
r.a = 0
Now, for angle between position vector r and acceleration vector a is given by:
cosФ = =
Ф = (0) = 0
Hence, it is proved that angle between position vector r and acceleration vector a = 0 and is it never changes.
Answer:
8, 20 and 6
Step-by-step explanation:
A coefficient is the numerical part of an algebraic term. Example: in the term 2x the coefficient is 2.
Answer:
-16
Step-by-step explanation:
Let's call the number x. Double the sum of x and seven is 2(x + 7) and two less than x is x - 2. Since these are equal we can write:
2(x + 7) = x - 2
2x + 14 = x - 2
x = -16
Answer:
cool
Step-by-step explanation:
Step-by-step explanation:
we need to use pythagoras's theorem (reversed) in this situation. We know the hypotenuse and the lower line, so we can find the upright one. That will be the value of AD.
so we use 81 (9 squared) and 144 (12 squared)
let x be the upright line's length
144-81=x squared
63=x squared
find the square root of 63 and you can have your answer
Im not gonna do that for you because that's pretty easy