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physics 101 ivy tech final exam questions with answers
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Two |metal |balls |are |placed |on |a |desk. |Both |balls |have |the |same | mass, |same |spherical |shape, |same |size |radius, |same |outer | appearance |(can't |tell |them |apart), |however |one |of |the |balls |is | hollow |and |the |other |is |solid. |How |can |you |tell |which |ball |the |solid | sphere |and |which |is |the |hollow |shell |- |CORRECT |ANSWERS |✔✔If |you |roll |the |balls |down |the |hill, |the |ball |with |the |lesser |inertia= |higher | velocity |will |arrive |first |which |would |therefore |be |the |solid |ball | (depends |on |mass |and |radii) Δ𝑚𝑔ℎ=12𝑚𝑣2+12𝐼𝜔 2 What |is |inertia? |- |CORRECT |ANSWERS |✔✔The |tendency |of |an |object | to |resist |a |change |in |motion angular |momentum |is |what |equation? |- |CORRECT |ANSWERS |✔✔L=iw L= |angular |momentum |(kg |⋅ |m2/s i= |moment |of |inertia |(kg*m2) w= |angular |velocity |(rad/s) if |the |net |torque |on |an |object |is |zero |its |________ |momentum |does | not |change |- |CORRECT |ANSWERS |✔✔angular
Angular |velocity |is |the |rate |of |change |of |- |CORRECT |ANSWERS | ✔✔angular |position Angular |acceleration |is |the |rate |of |change |of |- |CORRECT |ANSWERS | ✔✔angular |velocity. The |frequency |is |the |number |of |- |CORRECT |ANSWERS | ✔✔revolutions |per |second What |is |torque? |- |CORRECT |ANSWERS |✔✔turning |effect |produced | by |a |force |and |a |level |arm how |do |you |find |total |kinetic |energy |- |CORRECT |ANSWERS |✔✔Total | KE |= |total |mass |x |Average |KE and | add |translational |ke |and |rotational |ke The |frequency |is |the |number |of |complete |revolutions |per |second: |- | CORRECT |ANSWERS |✔✔f=w/2pi 1hz=1s^- the |period |is |time |one |rev |takes |- |CORRECT |ANSWERS |✔✔T=1/f
f |the |forces |on |an |object |are |such |that |they |tend |to |returnit |to |its | equilibrium |position, |it |is |said |to |be |in |. |- |CORRECT |ANSWERS | ✔✔stable |equilibirum if |the |forces |tend |to |move |away |from |its |equilibirum |point |its |said | to |be |- |CORRECT |ANSWERS |✔✔unstable |equilibirum if |the |center |of |gravity |is |outside |of |the |pivot |point |it |will |could | become |- |CORRECT |ANSWERS |✔✔unstable |and |then |stable |again hookes |law: |- |CORRECT |ANSWERS |✔✔the |change |in |length |is | proportional |to |the |applied |force | F=kchangeL what |is |young |modulus |- |CORRECT |ANSWERS |✔✔The |measure |of | stiffness |of |a |material. |stress/strain young |modulus |equation |- |CORRECT |ANSWERS |✔✔stress/strain stress= |force/area | strain= |change |in |length/ |original |length tensile |stress |- |CORRECT |ANSWERS |✔✔forces |tend |to |stretch |the | object
in |compressional |stress |- |CORRECT |ANSWERS |✔✔opposite |of |tensile | stress | differential |stress |that |squeezes/shortens |a |rock |mass, |folding, | reverse |fault, |convergent |boundary in |shear |stress |- |CORRECT |ANSWERS |✔✔it |tends |to |deform |an | object