Asked by wangai
                A uniform meter rule is balance at 30cm mark when of 50grams is hanging from its zero cm mark.calculate the weight of the rule?
            
            
        Answers
                    Answered by
            Damon
            
    m*(50-30) = 50*30 gives MASS, m, in grams (not really weight but is this math or physics?)
    
                    Answered by
            Anonymous
            
    the centers of mass of the two segments of the rule are halfway from the balance point to the respective ends
let x = mass of the rule in grams
(50 g * 30 cm) + (.3 x * 15 cm) = .7x * 35 cm
after dividing by 5 ... 300 g-cm + .9x g-cm = 4.9x g-cm
solve for x
    
let x = mass of the rule in grams
(50 g * 30 cm) + (.3 x * 15 cm) = .7x * 35 cm
after dividing by 5 ... 300 g-cm + .9x g-cm = 4.9x g-cm
solve for x
                    Answered by
            Damon
            
    Although that should work fine Anonymous, you do not have to split the 100 cm ruler into sections left and right of the balance point. The weight of a rigid body acts as if it were all at the center of mass, no matter what forces are acting on it where.
    
                    Answered by
            Melessa
            
    I want the answer please
    
                    Answered by
            Franklin
            
    I need the workings
    
                    Answered by
            Anonymous
            
    physics
    
                    Answered by
            mercy april
            
    clockwise moments=anti-clockwise moments
weight1 multiplied by distance1= weight2 multiplied by distance2
50-30=20
change to newtons
0.5 multiplied by 0.3= 0.2 multiplied by distance2
=0.75 newtons
    
weight1 multiplied by distance1= weight2 multiplied by distance2
50-30=20
change to newtons
0.5 multiplied by 0.3= 0.2 multiplied by distance2
=0.75 newtons
                    Answered by
            Anonymous
            
    Answer
    
                    Answered by
            Elizabeth Mbithe Kavita
            
    0.75 N
    
                    Answered by
            Elizabeth Mbithe Kavita
            
    0.75N
    
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