Register to reply

Pendulum problem

by physicshelp98
Tags: pendulum
Share this thread:
physicshelp98
#1
Apr24-10, 07:12 PM
P: 3
1. The problem statement, all variables and given/known data

a 2 kg pendulum of length 7 meters is moving at 1 m/s, calculate how high (h) the pendulum will rise; and the resultant angle.


2. Relevant equations
1/2mv2 = mgh

cos = Y/L

h = L ( 1- cos )


3. The attempt at a solution

1/2(2)(1)^2 = (2)(9.8) h
1 = 19.6h
1/19.6h
h = .051

just dont know how to go about gettign resultant angle
Phys.Org News Partner Science news on Phys.org
Flapping baby birds give clues to origin of flight
Prions can trigger 'stuck' wine fermentations, researchers find
Socially-assistive robots help kids with autism learn by providing personalized prompts
ideasrule
#2
Apr24-10, 08:15 PM
HW Helper
ideasrule's Avatar
P: 2,322
Have you tried drawing a diagram and writing out a trigonometric relationship using that diagram?
physicshelp98
#3
Apr24-10, 08:43 PM
P: 3
yeah i did and got h= 7 tan[tex]\theta[/tex], how would you find the actual angle that what im having difficult with.


Register to reply

Related Discussions
Pendulum problem i really need help Introductory Physics Homework 29
Pendulum Problem Introductory Physics Homework 2
One Kinematic Problem, One Pendulum Problem, One Wave Problem Introductory Physics Homework 7
Pendulum Problem Introductory Physics Homework 2
Pendulum Problem Introductory Physics Homework 3