Free problems arranged by topic
 Kinematics Dynamics Conservation laws Thermodynamics Waves Electricity Magnetism Optics Fluids and elasticity Ideal gas AC current

 Free problems: all problems
 Kinematics Dynamics Conservation laws Thermodynamics Waves Electricity Magnetism Optics Fluids and elasticity Ideal gas AC current

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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 and foot 2 is .

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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