Wednesday
April 23, 2014

Homework Help: physics

Posted by jennifer on Friday, November 3, 2006 at 4:52pm.

The length of a simple pendulum is 0.82 m and the mass of the particle (the "bob") at the end of the cable is 0.69 kg. The pendulum is pulled away from its equilibrium position by an angle of 6.7 ° and released from rest. Assume that friction can be neglected and that the resulting oscillatory motion is simple harmonic motion. (a) What is the angular frequency of the motion? (b) Using the position of the bob at its lowest point as the reference level, determine the total mechanical energy of the pendulum as it swings back and forth. (c) What is the bob's speed as it passes through the lowest point of the swing?



I will be happy to critique your thinking or work on this. Angular freq comes as a standard formula, and the other items for energy concepts (PEmax= KEmax)

i know for part a the answer is 3.547
rad/s but i don't know how to do part b & c

please someone tell me how to do part b & c i know how to do part a only

From geometry, figure how high from the base is the bob when it starts. Its potential energy is mgh where h is the vertical height. At thebottom, the KE has to equal that starting energy.
1/2 mv^=mgh
you can calculate the velocity.

but how do you do part b i still don't get it
thanks for the help

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - The length of a simple pendulum is 0.79m and the mass of the particle ...
physics - A 0.480 kg pendulum bob passes through the lowest part of its path at...
physics - A 0.480 kg pendulum bob passes through the lowest part of its path at ...
physics - ¬Calculate the period of oscillation of a simple pendulum of length 1....
Physics - The length of a simple pendulum is 0.72 m, the pendulum bob has a mass...
physics - A pendulum is constructed from a thin, rigid, and uniform rod with a ...
physics - A grandfather clock uses a physical pendulum to keep time. The ...
Physics - A 0.31 kg pendulum bob passes through the lowest part of its path at a...
physics - A Foucault pendulum is designed to demonstrate the effect of the Earth...
Physics - A pendulum consists of a tiny bob of mass M and a uniform cord of mass...

Search
Members