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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 is1)2.5N2)7.5N3)22.5N4)30N `
4 months ago

Pooja
126 Points
```							                  T2       T120N⬅️1⃣➖3⃣➖8⃣➡️140N             m3     m2    m1                          ➖➖➡️a  The net force on the system is 140-          20=120NSo acceleration is 120÷(8+3+1)=10m/s2Let the force between m3 and  m2 be  T2 Using free body diagram of m3                    ➖➡️m3(a)          20⬅️1⃣➡️T2 T2-20=m3(a)Hence T2= 1(10)+20          T2 = 30NThe reaction between blocks m2 and m3 is 30 N (4th option)
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4 months ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions