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  • The wedge is kept below the 60 cm mark on the meter scale known masses of 1 kg and 2 kg are hung at 20 cm and 30 cm mark respectively. Where will a 4 kg mass will be hung on the meter scale to bala

The wedge is kept below the 60 cm mark on the meter scale known masses of 1 kg and 2 kg are hung at 20 cm and 30 cm mark respectively. Where will a 4 kg mass will be hung on the meter scale to balance it? (in cm) 

Option: 1

85


Option: 2

90


Option: 3

70


Option: 4

75


Answers (1)

best_answer

 

 

To find the mass of a given body using a metre scale by principle of moments -

 

 

 

 

As we learn

To find the mass of a given body using a metre scale by principle of moments -

m = M \frac{A}{a}

Calculation

m=\frac{m_{1}+m_{2}+m_{3}}{3}

m = mean mass

 

 

 

At equilibrium, net moment = 0

\Rightarrow 1kg\times 40 cm+2kg\times 30 cm=4 kg \; x

x= 25 cm (from wedge)

Distance from end = 85 cm

 

Posted by

Kuldeep Maurya

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