A bag of mass 4.0 kg is raised through a vertical height of 1.5 m. Use g=10 N/kgg=10\ \mathrm{N/kg}g=10 N/kg. What is the increase in gravitational potential energy?
6.0 J6.0\ \mathrm{J}6.0 J
15 J15\ \mathrm{J}15 J
60 J60\ \mathrm{J}60 J
40 J40\ \mathrm{J}40 J