Integrate sin2(x)cos4(x)dx using reduction formulas?
My book says integral sin2(x)cos4(x)dx= integral cos4(x)-integral cos6x dx
Now the reduction formula for n=6
for integral cos6(x)dx= (1/6)cos5(x)sinx+(5/6) integral cos4(x)dx
Here is the part I don't get: It then says ...
Homework Statement
A box is pulled up an incline which is 285 m long and in the process the box rises 16.7 m. The force pulling the truck is 18300 N.
A) If there was no friction, what is the weight and mass of the box? B)If friction provides a force of 17,400 N, what is the force pulling the...
oh no. That means the whole lab is wrong, but I'm doing the math right?
We measured the applied force with a spring scale and the distances with a ruler. i think the distances are completely wrong now...
Homework Statement
we did a lab on pulleys. The weight lifted was 19.62 N. It rose 0.20 meter with us applying a lifting force of 11 N and pulling the rose a distance of 0.16.
The Attempt at a Solution
I tried to find the efficiency of the pulley, so E=work out/work in
so work...
How do you determine how many strings a pulley has by looking at it?
Like say this picture for example:
http://www.knowledgerush.com/wiki_image/8/8f/Pulley_class2.PNG"
Would that be 2 strings?
And I think the efficiency improves as the number of strings lifting the mass increases? I that...