Why did smaller states object to the virginia plan

Smaller states objected to the Virginia Plan because the Virginia Plan tied each state's representation in the legislative branch to population. This meant that large states like Virginia would have more delegates while smaller states like Rhode Island would have had fewer. This led to the Great Compromise, creating our bicameral legislature where the House of Representatives is based on population and the Senate provides two seats to each state, regardless of population. 

Today, this means sparsely populated states like Wyoming will have little to no say in the House (they have only one Representative); however, they have just as much say in the Senate as New York since all states get two Senators no matter what.