2.) A 3.0-m-long rigid beam with a mass of 100 kg is supported at each end. An 80 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam?
3) A uniform ladder 6.0m long rests at 45º angle against a frictionless wall. If the ladder has a mass of 20kg, what is the frictional force at the base of the ladder?
4)You're carrying a 3.6m long, 25kg pole to a construction site when you decide to stop for rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip. How much force must you exert to keep the pole motionless and horizontal?
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