Stone with a mass of 85 kg. is lifted upwards with a 2.5 m long bar. There is a smaller stone below the bar as a support point at a distance of 0.45 m from the end of the rock. Calculate how much force is needed to move the rock?

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.