1) During a gas expansion experiment the pressure (P) and volume (V) are related by the law P=0.2V1.2 Determine the work done when the volume is expanded from 2m3 to 10m3 2) The motion of a passenger lift is described by the equation. v=3t2+2t+4 Find the distance travelled in metres 10 seconds after starting from rest. 3) A tensile test curve follows the equation. F=4s3+6s22s+7 Determine the work done in snapping the test piece if the elongation is 4mm. 4) 12(x25x+5)dx=