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...
- Physics - 3) a) Calculate the unstretched length of a spring, which has a Hooke'...
- physics - I need help understanding these, please. Thanks! 1. A 2 kg body moves ...
- phy - Two constant forces act on an object of mass m = 4.50 kg object moving in ...
- physics - If there is just one force acting on an object, does its work ...
- physics - If there is just one force acting on an object, does its work ...
- Physical Science - Can someone please check these answers for me? Write T for ...
- Math-Algebra - 1. The force (in Newtons) applied to an object varies jointly as ...
- Physics - Object A has mass mA = 9 kg and initial momentum A,i = < 19, -7, 0...

More Related Questions