How can you say that M3 is called drive unit​

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

+15-35=-20

going in opposite directions