What does it mean for two parameters to be inversely proportional?

Why should seat belts not be mandatory quick plz

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.