Sunday
April 20, 2014

Homework Help: Physics

Posted by Anonymous on Sunday, October 4, 2009 at 12:03pm.

Uniform Circular Motion:

Suppose that a particle's position is given by the following expression:

r(t) = Rcos(omega*t)i + Rsin(omega*t)j

1. Choose the answer that best completes the following sentence:
The particle's motion at t=0 can be described by ____________.

a. an ellipse starting at time t=0 on the positive x axis
b. an ellipse starting at time t=0 on the positive y axis
c. a circle starting at time t=0 on the positive x axis
d. a circle starting at time t=0 on the positive y axis

2. When does the particle first cross the negative x axis?
Express your answer in terms of some or all of the variables omega, R, and pi.

3. Find the particle's velocity as a function of time.
Express your answer using unit vectors (e.g., A i+ B j, where A and B are functions of omega, R, t, and pi).

4. Find the speed of the particle at time t.
Express your answer in terms of some or all of the variables omega, R, and pi.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - To find the velocity and acceleration vectors for uniform circular ...
college Physics - The coordinates of an object moving in the xy plane vary with ...
Physics - A spherical shell of radius R carries a uniform surface charge density...
Trigonometry - Prove that sin^2(Omega) - Cos^2(Omega) / tan(Omega) sin(Omega) + ...
physics - For this problem use the Uniform circular motion mode of the ...
physics - The angular position of a point on the rim of a rotating wheel is ...
Physics - You have a mass of 2 kg attached to a spring with a spring constant 18...
Forced Oscillation - drwls => I need your help =) - A 2.00kg object attatched...
Physics - Suppose that the force acting on a mass m is F=-kx+fsin(omega)t. a.) ...
Trigonometry - Prove that sin^2(Omega) - Cos^2(Omega) / tan(Omega) sin(Omega) + ...

Search
Members