Imagine a spring made of a material that is not very elastic, so that the spring force does not satisfy hooke’s law, but instead satisfies the equation f = −α x + β x3 , where α = 5.2 n/m and β = 700 n/m3 . calculate the work done by the spring when it is stretched from its equilibrium position to 0.12 m past its equilibrium. answer in units of mj.

Three archers each fire four arrows at a target. joe’s four arrows hit at points 10 cm above, 10 cm below, 10 cm to the left, and 10 cm to the right of the center of the target. all four of moe’s arrows hit within 1 cm of a point 20 cm from the center, and flo’s four arrows hit within 1 cm of the center. the contest judge says that one of the archers is precise but not accurate, another archer is accurate but not precise, and the third archer is both accurate and precise. which description applies to which archer? explain

From 0 to 5 seconds john pushed a box 5 meters. from 5 to 10 seconds, paul pushed the same box another 5 meters. who did more work? a. john b. paul c. john and paul did the same amount of work.

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is