If we have a vector P, then we name it's components by the axis we project it onto.
In 2D Cartesian coordinate system we have one x axis and one y axis.
Vector P can then be represented with two components: Px and Py.
Px is the component of vector P on the x axis and Py is the component of the vector P on the y axis.
The loudness or sound intensity of the roaring truck engine is inversely proportional to the square of the distance. it follows the law of squares that is
r1^2 / r2^2 = L2/L1
8^2 / 4^2 = L2 / 100 dB
L2 = 400 dB
The answer to this problem is 400 dB increased frim 100 dB.
Answer:
See below
Explanation:
Total distance covered while jogging = 20 + 5 = 25 m
in 15 sec speed is then 25 m / 15 s =<u> 1 2/3 m/s </u>
<u />
Displacement = 20 - 5 = <u>15 meters east</u>
Kids fall in love so quick because they have no idea what it is. Many of them get "broken hearted" But in actuality they have no idea what that is either. Love is an intense feeling of deep affection. Youths don't understand the freedom they have without someone. They only focus on what life would be with someone. Even though they don't understand everything. What I am trying to get at is, adults have more experience in the open world and how people grow up to be. Kids are just in school with the same people everyday thinking "hey I'm gonna be stuck with these people for the next 4 years might as well become more than friends"
Get what I mean? Hope this helps!
Answer:
58.5 m
Explanation:
First of all, we need to find the total time the ball takes to reach the water. This can be done by looking at the vertical motion only.
The initial vertical velocity of the ball is
where
u = 21.5 m/s is the initial speed
is the angle
Substituting,
The vertical position of the ball at time t is given by
where
h = 13.5 m is the initial heigth
is the acceleration of gravity (negative sign because it points downward)
The ball reaches the water when y = 0, so
Which gives two solutions: t = 3.27 s and t = -0.84 s. We discard the negative solution since it is meaningless.
The horizontal velocity of the ball is
And since the motion along the horizontal direction is a uniform motion, we can find the horizontal distance travelled by the ball as follows: