When the velocity of a mass on a spring is zero, the acceleration is at

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is

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.)