Thank you! So now I can work it out as
* If I don't multiply and just cross out the h's, the denominator's -h canceled out by the numerator's +h--I can just ignore the signs? I always thought the top's leftover -2 would become positive or something, oopes. Do I just always cross out the...
First principles--do both equations always work?
Homework Statement
Find the slope of the tangent line to f(x) = 4 / (3-x) at the point x = 5.Homework Equations
m = lim(x->a) f(x) - f(a) / (x-a)
m = lim(h->0) f(a+h) - f(a) / hThe Attempt at a Solution
With the second equation:
As the...
I would start by a component analysis, but since I don't have the angle I can't really do that--which means I'll have to start by finding the angle, but I'm under the impression that all equations I will be using will require components. I know I'm missing some concept but I can't figure it out...
Launching a projectile while on something with velocity
Homework Statement
A man is riding on a cart which is moving at a constant velocity of 10 m/s. He wishes to throw a ball through a stationary hoop 5.0 m above his extended hand in such a manner that the ball will be at the top of its...
I just realized I had no idea how I got 2.94 – 196 = -490 or other glaring errors. Is this correct?:
Fg2 - T = -m2a
196 - T = (20.0)(-0.147)
= -2.94
-T = -2.94 – 196
T = 198.94
Final calculations:
T = -62.9 + 4194.4sinθ
(-) T = 198.94
---------------------------
0 = -260.94 +...
Thank you! I omitted Fn and changed the equation to this:
-Fgx + T = -m1a
-4194.4sinθ + T
= (428)(-0.147)
= -62.9
So that the final calculations were:
T = -62.9 + 4194.4sinθ
(-) T = -490
---------------------------
0 = 427.1 + 4194.4sinθ
-427.1 = 4194.4sinθ...
Homework Statement
Determine the angle of incline on https://www.physicsforums.com/attachment.php?attachmentid=30517&stc=1&d=1291856979" frictionless air track.
Acceleration = 0.147 m/s2.
The answer is supposed to be 4.10°.
Homework Equations
Fnet = ma
The Attempt at a...
Determine mass of a glider on an air track [solved]
[SIZE="1"]Homework Statement
A 20.0 g mass is stringed to a glider on an air track through a pulley (https://www.physicsforums.com/attachment.php?attachmentid=30478&stc=1&d=1291794499"). I'm supposed to find the mass of said glider...