two blocks of ice, one four times as heavy as the other, are at rest on a frozen lake. a person pushes each block the same distance d. ignore friction and assume that an equal force f⃗ is exerted on each block.

What are the two main ideas of this passage? museum experts feel that museums must change to attract visitors. museum experts care more about the number of visitors than about history. museums that display artworks and exhibits do not make families welcome. museums like colonial williamsburg make learning about the past fun. museums in the united states are different than in other countries.