A60-kg woman stands on the very end of a uniform board, which is supported one-quarter of the way from one end and is balanced. what is the mass of the board?

a. 60 kg
b. 30 kg
c. 20 kg
d. 15 kg
e. 120 kg

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Ineed the answer to question 1 , i’m desperate

Three charge are arranged as shown in the diagram. the magnitude of the net electrical force acting on the +6 uc charge, rounded to the tenths place, is .