URGENt QUESTION!!!!!!!!!?

Question

A, B,C r pts. on straight line with AB=BC=CD . a particle move s along the line with uniform motion. its avg velocity is 12 m/s for motion between A &B & 20 m/s for motion between C&D. find velocities @ A,B,C &D.hence find its average velocity between B&c

Answer 1

Here is how to solve ANY problem involving uniform acceleration:

1. List all the variables that are relevent to the problem: (time, position, and velocity at each point, as well as the acceleration).
i.e.:
tA, tB, tC, tD
xA, xB, etc.
similary for v
a, the (constant) acceleration

2. Identify which variables are known, i.e.
> t = 0 at A, or write this as tA = 0
> xA = 0
> any others?

3. Identify which of the variables are UNknown.

4. Use the information given (in this case, the statements about average velocity) to write equations relating some of the variables to each other.

5. Use the standard equations for uniform acceleration to relate more of the variables to each other. You know:
xB = xA + vA*tB + (1/2)*a*t^2
etc.

(You should end up with as many equations as there are unknowns; if not, then you are missing something.)

5. Use algebra to eliminate variables from the equations until you find the required answer(s).

Answer 2

16

Answer 3

average = ( 12 + 20 ) / 2

Answer 4

Sorry I audited that class this summer.

Answer 5

I'm not going to do your homework for you.

Answer 6

Do your own homework!
You'll learn more.

Answer 7

umm pony