Homework Statement
Find the equation of the tangent at the point indicated
y=3cscx
x=pi/4
2. The attempt at a solution
So to do the question you need a point (which im given), the slope and then you need to substitute that all into y=mx+b.
I believe I have differentiated...
:rofl: I feel really stupid right now. I knew something was up, turns out I was forgetting the product rule for all the questions. Thanks for clueing me into that. What a silly mistake.
I must be doing something wrong I keep getting the wrong answers.
Example:
s(t) = (4t^2 + 5)^3 t=1
I do the work
First Derivative - 24t(4t^2 + 5)^2
Second Derivative - 384t^2(4t^2 + 5)
My answer is 3456 m/s and the book tells me it is 5400 m/s
Homework Statement
Velocity in m/s at time t is defined as v= 20t(1+2t)^-2
Find Acceleration at 0.5s
2. The attempt at a solution
I missed the day we covered this topic in class and I am under the assumption that I would find the derivative of 20t(1+2t)^-2 and then find the derivative...
The first one I understand now, I get (x+1)(x+2)(x-2)
The second one im still not really sure
Here is the third one I think
(m-n)[2m + (m+n)]
(3m+n)(m-n)
I dont know why but I have a lot of trouble factoring. After 3 years of it I would expect to be a lot better at it but I still find it as hard as when I first learned it. Im just wondering if anyone here can help me understand it a little different then my teachers have.
To date I think I...
Sorry I don't know how to show the root sign on the forums so I am just gonna use /
Homework Statement
A stretch is applied to the graph of y=/x to produce the graph of y=/9x . Relative to the x and y axis, this stretch may be described as either a........ (then it lists a, b, c, or d answers)...
Homework Statement
Two Charged spheres are positioned on a horizontal, frictionless insulating surface, as shown below.
I attached the image at the bottom of the post.
Homework Equations
Coulombs Law and F=ma
The Attempt at a Solution
I plugged in ((8.99 x 10^9)(5.0 x 10^-7)(5.0 x...
K thanks for clarifying that for me.
It was more of a brain fart on my part, I realized you can find the change in velocity using the equation, but it was different then what I guessed because the ball was initially going at 18.5 m/s then I figured it would be rebounding back 18.5 m/s so I...
So I figured if impulse is equal to the change in momentum then I could use the force and time in the equation to get the change in momentum.
so 950(3.2/1000) = 3.04
Which is the correct answer apparently (3.04 kg m/s, west).
What I'm still puzzled by is there is so much more info in the...
Homework Statement
A tennis ball with a mass of 110g is traveling 18.5 m/s east. It is struck by a racquet that applies a force of 950 N west. The ball and the racquet are in contact for 3.2ms. The change in momentum of the tennis ball is..
Homework Equations
As far as I can tell p=mv and...