358 Static Equilibrium and Elasticity*P12.21(a)We model the horse as a particle. The drawbridge will fallout from under the horse.αθ===°=mgmg1201320323 9 8020 02800173AAAcoscos.cos...msmrad s22ejaf(b)122Imghω=∴⋅= ⋅−1213121220mmgAAωθsinbgRyRxmg0AFIG. P12.21(a)∴=−=−°=3139808001201560gAsin..sin.±msmrad s2(c)The linear acceleration of the bridge is:a=1212806907A...m radsmsThe force at the hinge + the force of gravity produce theacceleration a=. ms2at right angles to the bridge.Rmaxx°=−2 0006 9072504 72kgm skN2os.gmayy−=RyRxmg0aFIG. P12.21(c)
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .