Post a New Question


posted by .

i know how to do it, i keep getting the wrong answer!!

a bob of mass 4.00 kg is suspended from a fixed point by a massless string of length 1.50 m. The bob moves in a horizontal circle with the string always making an angle theta=22 from the vertical. what is the speed of the bob?

(tension is 42.3 N)

  • physics -

    Look at the tension:
    Now, the horizontal component of tension is tension*costheta, or mg/tantheta

    That must equal centripetal force,
    the radius must be 1.50*sinTheta

    so finally,
    mv^2/1.5*sintheta =mg/tantheta
    solve for v
    check my thinking.

  • physics -

    thank you so much!! it was so frustrating to get the wrong answer after wrong answer..

Answer This Question

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question