Tweedeldum and tweedledee are carrying a uniform wooden board that is l = 3.00 m long and has a weight of w = 160 n . if tweedledum applies an upward force of magnitude f1 = 60.0 n at the left end of the board, at what point and with what magnitude f2 of force does tweedledee have to lift for the board to be carried?

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •