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2) Two carts have masses 1.5 kg and 0.7 kg, respectively, are initally at rest and are held together by a compressed massless spring. When released, the 1.5 kg cart moves to the left with a velocity of 7 m/s. What is the velocity and direction of the 0.7 kg cart? Two masses m1=5 kg and m2=10 kg, connected by an inextensible string over a frictionless pulley, are moving as shown in the figure. The coefficient of friction of horizontal surface is 0.15. The minimum weight m that should be put on top of m2 to stop the motion is : Option 1) 10.3 kg Option 2) 18.3 kg Option 3) 27.3 kg Option 4) 43.3 kg