Recent content by ddtozone

  1. D

    Addition of vectors with triangle vertices

    Oh okay, so it all cancels out and comes to 0. That makes sense. Thank you!
  2. D

    Addition of vectors with triangle vertices

    Homework Statement If A, B, and C are the vertices of a triangle, find the following. (A→B) + (B→C) + (C→A) The answer has to be given like this: _____ i + _____ j 2. Homework Equations (I think?) a+b=b+a a+(b+c)=(a+b)+c a+0=a a+(-a)=0 c(a+b)=ca+cb (c+d)a=ca+da (cd)a=c(da)...
  3. D

    Center of mass question (man on a boat)

    because this is a question with multiple parts, and the answers to the first parts are based on the reference points of the boat's initial position, with the left of the boat starting at x=0. I guess there's a chance that SmartPhysics has an error, but I'm completely stumped.
  4. D

    Center of mass question (man on a boat)

    Homework Statement A man with mass m1 = 60 kg stands at the left end of a uniform boat with mass m2 = 169 kg and a length L = 2.7 m. Positive x is pointing to the right. Assume there is no friction or drag between the boat and water. After the man walks to the right edge of the boat, what is...
  5. D

    Three blocks connected by two strings: tensions?

    Thanks a ton! That makes much more sense.
  6. D

    Three blocks connected by two strings: tensions?

    Homework Statement Three blocks on a frictionless surface are connected by strings like so (from left to right): Block 1 (m=10kg) to string with Tension 1 to Block 2 (m=20kg) to string with Tension 2 to Block 3 (m=30kg) to string with Tension 3. The blocks are pulled to the right with...
  7. D

    Two blocks with spring (no friction), force applied: displacement?

    Oh ok, that makes more sense. But wouldn't you divide by the constant instead of multiplying by the constant, so the final answer would be N/(N/m)=m?
  8. D

    Two blocks with spring (no friction), force applied: displacement?

    Homework Statement A 2kg block & 3kg block (left & right, respectively) are on a horizontal frictionless surface connected by a spring with K=140 N/m. A 15N force is applied to the 3kg block towards the right. How much does the spring stretch from its equilibrium length? Homework...
Back
Top