Pendulum Problem with unknown angle

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SUMMARY

The Pendulum Problem involves calculating the speed of a ball at an angle θ using the principles of energy conservation. The initial kinetic energy (Ek) is derived from the height of the pendulum when released, which can be expressed as potential energy (PE = mgh) at angle θ. By determining the height of the ball at this angle, one can calculate the kinetic energy and subsequently the speed (v) as a function of mass (m), gravitational acceleration (g), string length (L), and angle (θ).

PREREQUISITES
  • Understanding of basic physics concepts, specifically energy conservation.
  • Familiarity with pendulum motion and its dynamics.
  • Knowledge of gravitational potential energy (PE = mgh).
  • Ability to manipulate algebraic equations to solve for variables.
NEXT STEPS
  • Explore the derivation of the speed of a pendulum at various angles using energy conservation principles.
  • Learn about the relationship between potential energy and kinetic energy in oscillatory motion.
  • Investigate the effects of varying string length (L) on pendulum motion and speed.
  • Study advanced pendulum dynamics, including damping and external forces.
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Students of physics, educators teaching mechanics, and anyone interested in understanding pendulum motion and energy conservation principles.

jg727
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A pendulum (with string length "L") and aball of mass "m" is pulled back to a horizontal position and then released. Assuming that θ is the angle between the string and the vertical, find the speed of the ball (v) at an angle of θ as a function of m,g,L, and/or θ.


I just can't get my mind around this problem...
 
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Welcome to PF, jg!
I could be horrendous using motion formulas.
Have you considered an energy approach? The initial Ek is easy. Can you find the height when at angle θ and thus the potential energy? From that you can get the Ek at θ and then the speed.
 
Thank You!
Ok, so I guess I am actually having problems with finding the potential energy. I'm completely blanking.
 
PE = mgh
 

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