Recent content by rpullo

Homework Statement If an orbiting satellite has a total energy of -1.4 x 1012 J, then the binding energy is... b. 1.4 x 1012 J Homework Equations Eg = (-GMm)/r Binding energy = (GMm)/2r The Attempt at a Solution I was just wondering why the answer is 1.4 x 1012 J. Thanks

Homework Statement Santa Claus and his wife place a 10 m long ladder against a wall (which is vertical). Santa Claus climbs to the top while Mrs. Claus steadies the bottom. However, Mrs. Claus left because she had to give birth, so the ladder began to slip. The ladder kept in contact w/ the...

Alright, scratch the top part. I've thought of this as a solution and was wondering if anyone can confirm this. i. Time is takes for the sound to reach Milly: t = d/v = (35.0 m - 1.0 m)/340 m/s = 0.10s ii. Time is takes for warning to reach Milly and for her to respond: 0.10 s +...

Homework Statement Little Willy, clumsy clot, From window sill dislodged a pot. He shouts below to Little Milly: "Step aside, it'll knock you silly!" The window sill is 35.0 m above the sidewalk where Millly is standing directly below the falling pot. Milly is 1.05 m tall, her ears...

So we did a dry lab in class, and we were determining sources of error for a particular lab dealing with the measurement of rate of reaction. My teacher said that the time intervals of the recorded concentration was too far apart (1 minute intervals). I was wondering if anyone would explain...

I'm confused. Shouldn't u2 be 0, since the 2nd ball is initially hanging?

Alright...one question. I'm not sure if this is a mistake on your part of if I'm missing something but.. Why does Ek = 0.5(u2)^2?...Shouldn't it be Ek = 0.5m(u2)^2?

Ok from: Conservation of momentum: mv1 + mv2 = mv1' + mv2' and Conservation of energy: 0.5mv1^2 + 0.5mv1'^2 = 0.5mv2^2 + 0.5mv2'^2 ...I got: (1)... m(v1+v1') = 2m(v2'-v2) (2)... 0.5m(v1+v1')(v1-v1') = m(v2'+v2)(v2'-v2) Since v1' and v2 are 0 and m's can cancel: (3)... v1 =...

So I basically tried what you were saying...but I can't seem to find an expression for v1 to find h. I was wondering if you could help me get started with finding it. THanks

Homework Statement Two small balls are suspended side by side from two strings of length L so that they just touch when in their lowest positions. Their masses are m and 2m, repectively. If the left ball (of mass m) is pulled aside and released from a height h, it will swing down and...

Homework Statement "Rockey Bourchard" sends a 0.4 kg puck at 80 m/s which is caught by goalie "Crazy Chretien" who is stationary on his knees on the ice. If the coefficient of friction of Chretien on the ice is 0.05, and his total mass is 90 kg, how far does he slide on the ice before...

That dosen't help me :(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(

An attempt at the question: Fg is a constant 833 N on Tarzan. Because Fc = T - Fg T = Fc + Fg = mv^2/r + 833 = 85v^2/r + 833 Sort of stuck there...

Homework Statement Tarzan wishes to swing across a crocodile infested river to consort with Jane, using a vine rope to swing on. In order to reach Jane's side he must swing so that the rope makes a maximum angle of 40 degrees to the vertical. Regarding Tarzan as an 85 kg point mass, what...