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Physics problems: dynamics

Part 7

 

 

Problem 61.

Calculate the pressure exerted by a girl if her mass is 70 kg and area of her foot 1 is pressureand foot 2 is area.

Solution

 

Problem 62.

A uniform meter scale can be balanced at the 70 cm mark when a mass of 0.05 kg is hung from the 94 cm mark, draw a diagram of the arrangement, find the mass of the meter scale.

Solution

 

Problem 63.

A uniform meter scale of weight 50 g is balanced at 30 cm mark when weights of 80 g and 60 g act at 5 cm mark and 45 cm mark, respectively.  What force must be applied at 20 cm mark to balance the meter scale?

Solution

 

  

 

 

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