3. What is farce required at B to keep the lever balanced? The triangle is a support. 2m 3m 36 N O 5 N 18 N 7N. What is the torque of a force of 10 N pushing a door open at a point 30 cm from its hinged edge if the force meets the door at an angle of 30? . What is the tension required in the wire T, to keep the weightless beam from rotating? The pin is attached to a wall. (Assume two significant digits) "weightless beam" 100 N : load 4m O 450 N O 350 N O 100 N 400 N 6. Find the center of mass of three point masses arranged on the x axis: 3 kg at x = 3 cm, 2 kg at x = 1 cm and 1 kg at x = -1 cm. 1.67 cm 2.00 cm 1.80 cm O 1.33 cm7. What is force required at B to keep the seesaw balanced? The triangle is a support. 2m 3m 10N B 18N 4m