Answer :

Resultant force = 32 - 20 = 12 N

Acceleration of the block = = = 4 m/s2 (towards right)


m1= 3 kg × () = 1 kg


m2 = 3 kg × () = 2 kg


Force exerted by m1 on m2 = m1a = 1*4 = 4 N = Force exerted by m2 on m


Therefore, total force = 20 + 4 = 24 N


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