Physics - Question

posted by .

I have this number where they give me the coordinates of 3 particles and the mass of each one of them. Afterwards, there's a force applied on 2 of those particles and they ask me to calculate the systems total moment of inertia. But then they ask me this:

If the system goes from rest and that the forces from c) are applied for 5 seconds and after that 5 seconds no more forces are exerted, how much time does the system take to perform one full rotation.

So I think I'll find the answer using
T = 2pie/w, where I'll find w by first finding my angular acceleration a = t/I
from where I can find w using w = at. Then I solve for T in the first one.

is that correct?

  • Physics - Question -

    Calculate I total for the three particles
    (I = sum of 1/2 m r^2 for all three).

    Then sum torques=I * angacceleration
    solve for ang acceleration.

    displacement=1/2 * angacceleration*time+wi*t

    where wi=angacceleartion*5sec
    solve for time from the displacement equation.

  • Physics - Question -

    thanks bob!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics-help

    In the figure below, four particles are fixed along an x axis, separated by distances d = 4.00 cm. The charges are q1 = +2e, q2 = -e, q3 = +e, and q4 = +5e, with e = 1.60 × 10-19 C. What is the value of the net electrostatic force …
  2. physics

    One dimension. In Fig. 13-32, two point particles are fixed on an x axis separated by distance d. Particle A has mass mA and particle B has mass 4.00 mA. A third particle C, of mass 80.0 mA, is to be placed on the x axis and near particles …
  3. physics

    One dimension. In Fig. 13-32, two point particles are fixed on an x axis separated by distance d. Particle A has mass mA and particle B has mass 4.00 mA. A third particle C, of mass 80.0 mA, is to be placed on the x axis and near particles …
  4. physics

    1. Calculate the radius of orbit for a hydrogen electron in the n=3 level. 2.The half life of an unknown substance is one minutes. If the initial number of particles is 20 how many particles will remain after two minutes have elapsed?
  5. physics

    The charges and coordinates of two charged particles held fixed in an xy plane are q1 = 2.32 μC, x1 = 3.08 cm, y1 = 0.793 cm and q2 = -3.14 μC, x2 = -1.75 cm, y2 = 1.05 cm. At what (a)x and (b)y coordinates should a third particle …
  6. Physics (2)

    I have this number where they give me the coordinates of 3 particles and the mass of each one of them. Afterwards, there's a force applied on 2 of those particles and they ask me to calculate the systems total moment of inertia. But …
  7. chemistry

    consider a random mixture of two particles,diamond and SiC.Assume all particles are spherical with a radius of 0.100mm. The mixture is 80.0 wt% diamond(density=3.51 g/ml) and 20.0 wt% SiC (density=3.23 g/ml) a)Calculate the mass of …
  8. Physics 1

    Two small particles of mass 16 kg and 27 kg are a distance 1.4 m apart. What is the gravitational force of one of these particles on the other?
  9. Physics 1

    This is a repost....:Two small particles of mass 16 kg and 27 kg are a distance 1.4 m apart. What is the gravitational force of one of these particles on the other?
  10. AP Physics C

    One dimension. In the figure, two point particles are fixed on an x axis separated by distance d. Particle A has mass mA and particle B has mass 5.00 mA. A third particle C, of mass 62.0 mA, is to be placed on the x axis and near particles …

More Similar Questions