Answers

  • Brainly User
2015-03-09T08:06:55+05:30
Woooden plank is a solid and hard substance when we tie yo our arm where we have joint it dosent allow to bend

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2015-03-10T19:43:30+05:30
Our arm is made up of joint whatever hard material is tied to it the wooden plank opposes it soo we cant bend our arm 
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