Posted by **Jake** on Sunday, April 3, 2011 at 2:35pm.

An object with mass 0.250 kg is acted on by an elastic restoring force with force constant 10.8 N/m. The object is set into oscillation with an initial potential energy of 0.150 J and an initial kinetic energy of 6.00×10−2 J.

What is the amplitude of oscillation?

What is the potential energy when the displacement is one-half the amplitude?

At what displacement are the kinetic and potential energies equal?

What is the value of the phase angle \phi if the initial velocity is positive and the initial displacement is negative?

- Physics -
**drwls**, Sunday, April 3, 2011 at 3:40pm
(1/2) k x^2 + (1/2)mV^2 = 0.21 J

= total energy = constant

Set V = 0 to solve for the amplitude, since V = 0 then

When displacement is half the amplitude, potential energy is 1/4 of the total, 0.1575 J

When KE = PE,

(1/2) kx^2 = 0.015 J. Solve for x at that time

The phase angle depends upon what you call zero phase. Yopu haven't said

## Answer This Question

## Related Questions

- oscillation - An object with mass 0.250 kg is acted on by an elastic restoring ...
- physics - A 20 kg object is acted on by a conservative force given by F = -3.0 x...
- Math-Algebra - 1. The force (in Newtons) applied to an object varies jointly as ...
- Physics - 3) a) Calculate the unstretched length of a spring, which has a Hooke'...
- physics - An object in space is initially stationary relative to the Earth. Then...
- Physics - An object in space is initially stationary relative to the Earth. Then...
- Physics - In a 1-dimensional problem, a single force acts on a 10 kg object and ...
- phy - Two constant forces act on an object of mass m = 4.50 kg object moving in ...
- Physics - Under what condition can a force act on an object and yet do no work ...
- physics - What does it mean to say the Coulomb Force is a conservative force? ...

More Related Questions