) you carry a 7.0 kg bag of groceries 1.2 m above the ground at constant velocity across a 2.7 m room. how much work do you do on the bag in the process
m = 7.0 kg, the mass of the groceries h = 1.2 m, the elevation of the bag of groceries
The bag of groceries moves a constant velocity over the 2.7-m room. At constant velocity, there is no applied force, and the kinetic energy remains constant.
At an elevation of 1.2 m, there is an increase in PE (potential energy) given by V = m*g*h = (7.0 kg)*(9.8 m/s²)*(1.2 m) = 82.32 J
