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Q.9A body of mass 40 gm is moving with a constantvelocity of 2 cm/sec on a horizontal frictionless table.The force on the table is -(1) 39200 dyne (2) 160 dyne(3) 80 dyne(4) zero dyne

Answer»

80 dyne ( F=ma, so 40* 2= 80 dyne )

f= m * a =mv/t for one second is t

so f= 40*2 gm cm per second f= 40*10 gm cm person

ie 80



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