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Pulling blocks question…?

Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force F. The magnitude of the tension in the string between blocks B and C is T= 3.00N . Assume that each block has mass m= 0.400kg.What is the magnitude F of the force?What is the tension T(AB) in the string between block A and block B?http://session.masteringphysics.com/prob%E2%80%A6

2 Answers

Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force F. The magnitude of the tension in the string between blocks B and C is T= 3.00N . Assume that each block has mass m= 0.400kg.The force, F, is causing all 3 blocks to accelerate at the same rate. The tension in the string between blocks B and C is caused by the horizontal force, F, which is pulling all 3 blocks.The string between blocks B and C is pulling blocks B and A. The 3.00 N force is causing the mass of B + A to accelerate.F = m * a3.00 = 0.800 * aAcceleration = 3.00 ÷ 0.800 = 3.75 m/s^2This is the acceleration of all 3 blocks!The horizontal force, F = (mass of 3 blocks) * 3.75 F = 1.2 * 3.75 = 4.5 NT(AB) is only pulling block A.T(AB) = 0.4 * 3.75 = 1.5 NThe tension force increase as more mass is being accelerated!... Show More

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