Recent content by idlackage

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...

Awesome, thank you so much!

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...

It works now, thank you so much!

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...