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61) Option (2) 0.2 N.
62) Option (4) 5N.
63) Option (1) 3/4.
64) Option (4) 9.8J.
65) Option (2) 1000.
66) Option (3) 3:4.
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61). The force on the body is 0.2 N .
62). The force acting on the body is 5 N .
63). Coefficient of static friction between the surface = tan θ = ( 3 / 4 ) .
64). The work done in moving the block is 9.8 J .
65). The density of liquid = ( 5 / 4 ) * 800 = 1000 .
66). The ration of the densities = 4 : 3 .
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