An insulator: conducts electrons resists conduction of electrons repels positive charges is neutral

What is the measure of a change in an objects velocity?

It is really hard for me right know

Question part points submissions used suppose that 2 j of work is needed to stretch a spring from its natural length of 26 cm to a length of 36 cm. (a) how much work is needed to stretch the spring from 28 cm to 32 cm? (round your answer to two decimal places.)