three blocks m1,m2 and m3 of masses 8kg,3kg and1 kg are placed in contact on a smooth surface.Forces F1=140N and F2=20N are acting on blocks m1 and m3 respectivly.The reaction between blocks m2 and m3 is 1)2.5N 2)7.5N 3)22.5N 4)30N

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Pooja · Answer

T 2 T 1 20N⬅️1⃣➖3⃣➖8⃣➡️140N m3 m2 m1 ➖➖➡️a The net force on the system is 140- 20=120N So acceleration is 120÷(8+3+1)=10m/s 2 Let the force between m3 and m2 be T 2 Using free body diagram of m3 ➖➡️m3(a) 20⬅️1⃣➡️T 2 T 2 -20=m3(a) Hence T 2 = 1(10)+20 T 2 = 30N The reaction between blocks m2 and m3 is 30 N (4th option)

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three blocks m1,m2 and m3 of masses 8kg,3kg and1 kg are placed in contact on a smooth surface.Forces F1=140N and F2=20N are acting on blocks m1 and m3 respectivly.The reaction between blocks m2 and m3 is 1)2.5N 2)7.5N 3)22.5N 4)30N

three blocks m1,m2 and m3 of masses 8kg,3kg and1 kg are placed in contact on a smooth surface.Forces F1=140N and F2=20N are acting on blocks m1 and m3 respectivly.The reaction between blocks m2 and m3 is
1)2.5N
2)7.5N
3)22.5N
4)30N

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three blocks m1,m2 and m3 of masses 8kg,3kg and1 kg are placed in contact on a smooth surface.Forces F1=140N and F2=20N are acting on blocks m1 and m3 respectivly.The reaction between blocks m2 and m3 is 1)2.5N 2)7.5N 3)22.5N 4)30N

three blocks m1,m2 and m3 of masses 8kg,3kg and1 kg are placed in contact on a smooth surface.Forces F1=140N and F2=20N are acting on blocks m1 and m3 respectivly.The reaction between blocks m2 and m3 is1)2.5N2)7.5N3)22.5N4)30N

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three blocks m1,m2 and m3 of masses 8kg,3kg and1 kg are placed in contact on a smooth surface.Forces F1=140N and F2=20N are acting on blocks m1 and m3 respectivly.The reaction between blocks m2 and m3 is
1)2.5N
2)7.5N
3)22.5N
4)30N