A box is moved along a ramp of length 5.0 m. Its vertical height increases by 1.2 m. The mass of the box is 8.0 kg. Use g=10 N/kgg=10\ \mathrm{N/kg}g=10 N/kg. What is the increase in gravitational potential energy?
9.6 J9.6\ \mathrm{J}9.6 J
40 J40\ \mathrm{J}40 J
400 J400\ \mathrm{J}400 J
96 J96\ \mathrm{J}96 J