General
Easy
Physics-

Three balls are dropped from the top of a building with equal speed at different angles. When the balls strike ground their velocities are v subscript 1 end subscript comma v blank subscript 2 end subscript and v subscript 3 end subscript respectively, then

Physics-General

  1. v subscript 1 end subscript greater than v subscript 2 end subscript greater than v subscript 3 end subscript    
  2. v subscript 3 end subscript greater than v subscript 2 end subscript greater than v subscript 1 end subscript    
  3. v subscript 1 end subscript equals v subscript 2 end subscript equals v subscript 3 end subscript    
  4. v subscript 1 end subscript less than v subscript 2 end subscript less than v subscript 3 end subscript    

    Answer:The correct answer is: v subscript 1 end subscript equals v subscript 2 end subscript equals v subscript 3 end subscriptAll the balls are projected from the same height, therefore their velocities will be equal.
    S o comma blank v subscript 1 end subscript equals v subscript 2 end subscript equals v subscript 3 end subscript

    Book A Free Demo

    +91

    Grade*

    Related Questions to study

    General
    chemistry-

    The conversion A to B is carried out bthe followinpath:
    Given: DS(A→C) =50e.u.,DS(C→D) =30 e.u., DS(B→D) =20e.u. Where.u.ientropunitheDS(A→B) is

    The conversion A to B is carried out bthe followinpath:
    Given: DS(A→C) =50e.u.,DS(C→D) =30 e.u., DS(B→D) =20e.u. Where.u.ientropunitheDS(A→B) is

    chemistry-General
    General
    chemistry-

    2molesof COaremixedwith 1moleofO2ina containerof1l.Theycompletelytoform2moles ofCO2.Ifthe pressurein the vesselchanges from70atmto40atm,whatwill bethevalue of DU in kJat500K(The gasesdeviateappreciably from idealbehaviour.) 2CO+O2→2CO2;DH=-560kJ/mol, 1Latm=0.1kJ For theprocessH2O(l)(1 bar,373K)→H2O(g) (1bar,373K),thecorrect setofthermodynamic parametersis-

    2molesof COaremixedwith 1moleofO2ina containerof1l.Theycompletelytoform2moles ofCO2.Ifthe pressurein the vesselchanges from70atmto40atm,whatwill bethevalue of DU in kJat500K(The gasesdeviateappreciably from idealbehaviour.) 2CO+O2→2CO2;DH=-560kJ/mol, 1Latm=0.1kJ For theprocessH2O(l)(1 bar,373K)→H2O(g) (1bar,373K),thecorrect setofthermodynamic parametersis-

    chemistry-General
    General
    chemistry-

    Which of the followingequationsrespresents standardheatofformationofCH4 ?

    Which of the followingequationsrespresents standardheatofformationofCH4 ?

    chemistry-General
    General
    chemistry-

    TheDH° for CO2(g) ,CO(g) and H2O(g) are 393.5,–110.5and–241.8Kjmol1respectively the standard enthalpychange (in KJ) for the reactionCO2(g)+H2(g)→CO(g)+H2O(g)is-

    TheDH° for CO2(g) ,CO(g) and H2O(g) are 393.5,–110.5and–241.8Kjmol1respectively the standard enthalpychange (in KJ) for the reactionCO2(g)+H2(g)→CO(g)+H2O(g)is-

    chemistry-General
    General
    chemistry-

    Fromthethermochemicalreactions,C(graphite)+½O2 →CO;DH=–110.5KJ CO+1/2O2 →CO2;DH=83.2KJ Theheatofreactionof C(graphite)+O2 →CO2is-

    Fromthethermochemicalreactions,C(graphite)+½O2 →CO;DH=–110.5KJ CO+1/2O2 →CO2;DH=83.2KJ Theheatofreactionof C(graphite)+O2 →CO2is-

    chemistry-General
    General
    chemistry-

    Thevalueofenthalpychange(DH)forthe reactionC2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l) at 27°Cis–1366.5kJmol–1.The valueofinter- nalenergychangefortheabovereactionat this temperaturewillbe-

    Thevalueofenthalpychange(DH)forthe reactionC2H5OH(l)+3O2(g)→2CO2(g)+3H2O(l) at 27°Cis–1366.5kJmol–1.The valueofinter- nalenergychangefortheabovereactionat this temperaturewillbe-

    chemistry-General
    General
    maths-

    When does the current flow through the following circuit ?

    When does the current flow through the following circuit ?

    maths-General
    General
    maths-

    The following circuit when expressed in symbolic form of logic is :

    The following circuit when expressed in symbolic form of logic is :

    maths-General
    General
    chemistry-

    Onemoleofanon-idealgasundergoesachange ofstate(2.0atm,3.0L,95K)→(4.0atm,5.0L,245 K)with achangein internalenergy,DU=30.0L atm.Thechangeinenthalpy(DH)oftheprocessinLatmis-

    Onemoleofanon-idealgasundergoesachange ofstate(2.0atm,3.0L,95K)→(4.0atm,5.0L,245 K)with achangein internalenergy,DU=30.0L atm.Thechangeinenthalpy(DH)oftheprocessinLatmis-

    chemistry-General
    General
    chemistry-

    Inconversion oflime-stonetolime,CaCO3(s)→CaO(s)+CO2(g)thevalues ofDandDare+179.1kJmol–1and160.2J/Krespectivelyat298Kand1bar.AssumingthatDHºandDSºdonotchange withtemperature,temperatureabovewhich conversionoflimestonetolimewillbespontaneous is-

    Inconversion oflime-stonetolime,CaCO3(s)→CaO(s)+CO2(g)thevalues ofDandDare+179.1kJmol–1and160.2J/Krespectivelyat298Kand1bar.AssumingthatDHºandDSºdonotchange withtemperature,temperatureabovewhich conversionoflimestonetolimewillbespontaneous is-

    chemistry-General
    General
    chemistry-

    Considerthereaction:4NO2(g) O2(g)2N2O5(g) ,DH=–111kJ IfN2O5(s)isformedinsteadofN2O5(g)intheabove reaction,theDHvaluewillbe:(given,DHofsublimationfor N2O5is54kJmol )</span

    Considerthereaction:4NO2(g) O2(g)2N2O5(g) ,DH=–111kJ IfN2O5(s)isformedinsteadofN2O5(g)intheabove reaction,theDHvaluewillbe:(given,DHofsublimationfor N2O5is54kJmol )</span

    chemistry-General
    General
    chemistry-

    Ivieof the signof DG° or the following reactions:
    PbO2 +Pb→2PbO,DrG°<0
    SnO2 +Sn→2SnO,Dr>0, whicoxidation statearmorcharacteristic for leaand tin?

    Ivieof the signof DG° or the following reactions:
    PbO2 +Pb→2PbO,DrG°<0
    SnO2 +Sn→2SnO,Dr>0, whicoxidation statearmorcharacteristic for leaand tin?

    chemistry-General
    General
    chemistry-

    Consider threaction:N2+ 3H2→2NH3carried out at constantemperaturanpressureIDH anDarthenthalpy aninternaenergy changes for threaction, which of thfollowing expressions is true ?

    Consider threaction:N2+ 3H2→2NH3carried out at constantemperaturanpressureIDH anDarthenthalpy aninternaenergy changes for threaction, which of thfollowing expressions is true ?

    chemistry-General
    General
    chemistry-

    Assertion: At constanpressurfothe change H2O(s)→H2O(gwordoninegative.
    Reason: Durinphastransitiowordone ialwaynegative.

    Assertion: At constanpressurfothe change H2O(s)→H2O(gwordoninegative.
    Reason: Durinphastransitiowordone ialwaynegative.

    chemistry-General
    General
    physics-

    A particle is projected from a point A with velocity u square root of 2 at an angle of 45 degree with horizontal as shown in figure. It strikes the plane B C at right angles. The velocity of the particle at the time of collision is

    Let v be the velocity at the time of collision

    Then, u square root of 2 cos invisible function application 45 degree equals v sin invisible function application 60 degree
    open parentheses u square root of 2 close parentheses open parentheses fraction numerator 1 over denominator square root of 2 end fraction close parentheses equals fraction numerator square root of 3 v over denominator 2 end fraction blank therefore v equals fraction numerator 2 over denominator square root of 3 end fraction u

    A particle is projected from a point A with velocity u square root of 2 at an angle of 45 degree with horizontal as shown in figure. It strikes the plane B C at right angles. The velocity of the particle at the time of collision is

    physics-General
    Let v be the velocity at the time of collision

    Then, u square root of 2 cos invisible function application 45 degree equals v sin invisible function application 60 degree
    open parentheses u square root of 2 close parentheses open parentheses fraction numerator 1 over denominator square root of 2 end fraction close parentheses equals fraction numerator square root of 3 v over denominator 2 end fraction blank therefore v equals fraction numerator 2 over denominator square root of 3 end fraction u