Recent content by jorcrobe

  1. J

    What are the local maxima and minima of F(x)=(x^2)/(x+1)?

    I'd like to thank you both for your guidance. I will be looking into this further.
  2. J

    What are the local maxima and minima of F(x)=(x^2)/(x+1)?

    Homework Statement F(x)=(x^2)/(x+1) Find critical points Find local maxima & minima Homework Equations None The Attempt at a Solution F'(x) = x(x+2)/(x+1)^2 crit points: -2,0,-1 f(-2) = -4 f(0) = 0 f(-1)=undef My book is telling me that f(0) is the minima, and f(-2) is the...
  3. J

    Ballistic pendulum, finding final height

    Well, I used the first equation, and I am receiving a negative number. Why is it that when I solved for h, it was a number greater than the maximum height, L? I'm very sorry, I had never taken physics before this course.
  4. J

    Ballistic pendulum, finding final height

    The distance from the x axis, y=0.
  5. J

    Ballistic pendulum, finding final height

    So, the KE is not being conserved as PE? I see that there is also a horizontal displacement.
  6. J

    Ballistic pendulum, finding final height

    Homework Statement The Attempt at a Solution I used conservation of momentum for the initial velocity of mass 2, and conservation of mechanical energy for the movement from rest to highest position, KE=PE. The answer that I received is selected in the screenshot. However, when the...
  7. J

    Momentum when object is thrown at angle

    Good question. deg 22* Thanks a bunch!
  8. J

    Momentum when object is thrown at angle

    mt(vb)cos(30)=mc(v) ?
  9. J

    Momentum when object is thrown at angle

    Homework Statement A student standing on a stationary skateboard tosses a textbook, mt = 1.05 kg, to a friend standing in front of him. The student and the skateboard have a combined mass of mc = 104 kg and the book leaves his hand at a velocity of 2.25 m/s at and angle of 22 degrees with...
  10. J

    What Is the Minimum Mass Needed to Move the Block in a Pulley System?

    I have found that m2 = F_t/(g-a) I figure that at that instant a = 0? making m2 = 2.86
  11. J

    What Is the Minimum Mass Needed to Move the Block in a Pulley System?

    Homework Statement A block with mass, m1 = 5.5 kg rests on the surface of a horizontal table which has a coefficient of static friction of μs = 0.52. This block is connected to another block by a pulley system and it hangs vertically under the influence of gravity, g. The hanging block has...
  12. J

    Finding theta on an incline plane

    Homework Statement A block is resting on a wooden plank. On one end of the plank is a hinge so the other end my be lifted to create and angle θ with respect to the horizontal. The plank has a coefficient of static friction of μs. Using the sum of forces along the plank. Find the angle at which...