ElectricPavlov

Do you EVEN go back and look at your other postings????

https://web2.0calc.com/questions/quick-responses-would-be-greatly-appreciated

Oops sorry....didn't answer #1

vf = vo + at

0 = 55.6 m/s + a(1.8)

a = - 30.9 m/s^2

He had much more time to deccelerate through the trees (18 times more) so the DEcceleration is 1/18 of the decceleration of just hitting the ground and stopping in 0.1 s

His acceleration (up to reaching terminal velocity) is just the acceleration of gravity=

9.8 m/s^2

2. Terminal velocity =   55.6 m/s     then he goes to ZERO m/s in 0.1 sec  (ouch!)

      vf = vo + at       vf = vfinal = 0 (he stopped)    vo = original velocity of 55.6 m/s

       0 = 55.6 + a(0.1)

        a = - 556 m/s^2     (this will crush you like a bug under a steamroller)

This was answered just a couple of days ago...scroll through and look for it

-8   was the answer  

Here ya go:

The triangles have TWO angles that are equal ...there is 180 degrees in EVERY triangle, so the THIRD angle in each of the triangles is equal too....

C  similar to BCD   (going around the angles of the triangle in the same direction)

you can just use parentheses like this

(x^2+9)       or use the  LaTex function...

\(\sqrt{x^2+9}\)   + 3   = x+4      simplify by subtracting 3 from both sides of the equation

sqrt(x^2+9) = x+1        Now square both sides

x^2 + 9  = (x+1)^2       Now expand the R side

x^2 + 9 = x^2 + 2x +1  Subtract x^2 from both sides

9 = 2x+1 

8=2x

x=4

Is ONLY x^2 under the radical sign?

3 NOT similar

4 Similar PCB

Let's re-arrange the line equations to y=mx+b form for easier work

3x-12y+ 16 = 0   is the same as

y = 1/4 x + 1 1/4        Slope = 1/4    perpindicular slope is -4

14x-13y-52=0  is the same as

y=4/13x-4              y intercept (put x=0 into the equation) = -4

So now we have the slope of our line is -4   and a point  0,-4

y = -4x + b       Sustitute 0, -4 to find b

-4 = -4(0) + b

b = -4

Line then becomes   y = -4x - 4

Here is a graph: