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30 Statics

# 30 Statics - A wrench is used to attempt to turn a bolt The...

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A wrench is used to attempt to turn a bolt. The bolt has a radius of 1cm and the wrench is 30cm long. a) Draw the extended force diagram for the bolt/wrench system. b) Write out the expression that would determine the magnitude of the frictional force necessary to keep the bolt from turning.
A 60 lb child sits on the end of a 15 foot long teeter-totter. Where should her father (who is 180 lbs) sit to balance the teeter-totter? Draw an extended force diagram. 15 feet

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A 60 lb child sits on the end of a 15 foot long teeter-totter. Her father (who is 180 lbs) sits on the opposite side to balance the teeter-totter. If the teeter-totter weighs 20lbs, what force does the support exert? Draw a free body diagram. 15 feet
An 80kg worker stands on a 30kg platform. Give the appropriate diagrams and accompanying expressions (Newton’s Law) that would determine the tension in the cable and the magnitude and direction of the force of the wall on the platform.

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