a large iron block rapidly back and forth She com pares that

Last updated: 6/25/2023

a large iron block rapidly back and forth She com pares that to her moving it on earth on a smooth horizontal surface She finds that 1 the shaking costs her no effort because there is no weight of block 2 the shaking costs her some effort but consid erably less than on Earth 3 the effort required is same is that on earth the shaking costs hor