Blocks A and B of masses 2kg and 1 kg respectively are pushed up a frictionless slope by a 21 N force applied parallel to the slope as shown in the figure. Find the magnitude (in newtons) of the force of normal reaction between A and B. g=10m/s2

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answer is 7.

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Detailed Solution

a=21−12−62+1=1m/s2 For block B:N−6=1⇒N=7N

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