//Example 4.3
F_floor=150;//Backward force exerted (N)
f=24;//Net opposing force (N)
m=65+12+7;//Total mass of System 1, mass of professor+mass of cart+mass of equipment, (kg)
F_net=F_floor-f;//Net force (N)
a=F_net/m;//Acceleration (m/s^2)
printf('Acceleration = %0.1f m/s^2',a)
//Openstax - College Physics
//Download for free at http://cnx.org/content/col11406/latest