When the ramp is lowered, work is done to stretch a spring on the side of the ramp. Elastic potential energy is stored in the stretched spring. Figure 2 shows the ramp part way down in a balanced horizontal position. Figure 2 Force on the ramp due to the stretched spring Ramp 4 0.15 m Weight of the ramp Pivot (b) With the ramp horizontal: the moment caused by the weight of the ramp = 924 Nm the spring is stretched by 0.250 m Calculate the elastic potential energy stored in the stretched spring. Use data from Figure 2. ​