Which of the following has kinetic energy? A. a book on a shelf
B. a girl sprinting
C. a stretched spring ​

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Describe uniform velocity and variable velocity in short

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?