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    PICTURE IS BELOW i really need help for this question, specifically part (iii), I just dont know how to label the forces on that one.

    for part (i) I got Reaction force at B = 3125N and Reaction force at C=1875N

    for part (ii) i got M=302.04kg

    please share your answers.

    thanks
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    (Original post by amin11234)
    PICTURE IS BELOW i really need help for this question, specifically part (iii), I just dont know how to label the forces on that one.

    for part (i) I got Reaction force at B = 3125N and Reaction force at C=1875N

    for part (ii) i got M=302.04kg

    please share your answers.

    thanks
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    Hint for part (i): the weight of the bridge acts at the centre of AD, which means 2.1m to the right of A and therefore 0.6m to the right of B.
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    (Original post by old_engineer)
    Hint for part (i): the weight of the bridge acts at the centre of AD, which means 2.1m to the right of A and therefore 0.6m to the right of B.
    for part (i) i got that the weight is 2.4m away from both A and D since the bridge is 4.2m.

    for part (i) i got that the reacton forces of B and C must equal 5000N so the reaction force at B=3125N and the reaction force at C=1875N.

    for part (ii) i got that M=302.04kg

    what i really need help with is part (iii), i dont have a clue what to do with that one. if you could help me out with that then thatd be really great.

    thank you
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    (Original post by amin11234)
    for part (i) i got that the weight is 2.4m away from both A and D since the bridge is 4.2m.
    AD is 4.2m. Half of AD IS 2.1m. Therefore the weight of the bridge must be acting 2.1m (not 2.4m) from both A and D.
 
 
 
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