Recent content by titusdna

Got this question wrong on this weeks physics quiz and can't figure out why. I keep getting the same answer - which was wrong - over and over. What am I missing? By how much will a slab of concrete 18 m long contract when the temperature drops from 24 °C to -16 °C? (The coefficient of linear...

A hoop with a radius of .5m and mass of .2kg is released from rest and rolls down inclined plane. How fast is it moving after dropping from vertical distance of 3m? First I tried v=Iw/md but I had no info for angular velocity so I tried calculating using v=sq root 2xgxh and get 7.7m/s but my...