David explaining the sling using Physics


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Storyboard Description

David explains the idea behind the sling to his fellow soldier friends using Physics.

Storyboard Text

  • Now, I will teach you soldiers how to use the sling using Physics!
  • We know that the sling undergoes a uniform circular motion, which means that the rock in the pouch is moving in a circular motion at a constant speed
  • David now explains the concept of centripetal force
  • The centripetal force is a force that acts on a body moving in a circular path and is directed towards the center around which the body is moving.
  • Moreover, the centripetal acceleration is the rate of change of tangential velocity.
  • When a body is moving in a circular path at a distance "r" from its center, its velocity at any distance will be directed tangentially.
  • This leads us to the final term in today's lesson, which is the tangential velocity.
  • This is how the sling works guys. As you spin the rock in the pouch, it moves in a uniform circular motion, where the direction is constantly changing. As we let go of one side of the sling, the rocks gets projected tangentially from the sling.
  • Tune n next time for more ideas lessons about Physics!
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