for (int i = 0; i < cells.size(); i++) {
				float a[] = cells.get(i).updateAcceleration();
				cells.get(i).xVel += (a[0] * 1.0f/60.0f);
				cells.get(i).yVel += (a[1] * 1.0f/60.0f);
				cells.get(i).xPos += (cells.get(i).xVel * 1.0f/60.0f);
				cells.get(i).yPos += (cells.get(i).yVel * 1.0f/60.0f);
				cells.get(i).update();
			}
			for (int i = 0; i < cells.size(); i++) {
				//cells.get(i).update();
				for (int j = i+1; j < cells.size(); j++) {
					if (collision.BalltoBall(cells.get(i), cells.get(j))) {
						float normalx, normaly;
						normalx = cells.get(j).xPos - cells.get(i).xPos;
						normaly = cells.get(j).yPos - cells.get(i).yPos;
						float mag = (float) Math.hypot(normalx,normaly);
						normalx = normalx/mag;
						normaly = normaly/mag;
						float radiumSum = cells.get(i).radius+cells.get(j).radius;
						float penetrationdepth = radiumSum - mag;
						float percentCorrection = 0.5f;
						float slop = 0.02f;

						float inverseMassI = 1.0f/cells.get(i).mass;
						float inverseMassJ = 1.0f/cells.get(j).mass;
						float totalinverseMass = inverseMassI + inverseMassJ;

						float correctionX = normalx * ((Math.max(penetrationdepth-slop,0.0f)/totalinverseMass)*percentCorrection);
						float correctionY = normaly * ((Math.max(penetrationdepth-slop,0.0f)/totalinverseMass)*percentCorrection);
						cells.get(i).xPos -= (correctionX*inverseMassI);
						cells.get(i).yPos -= (correctionY*inverseMassI);
						cells.get(j).xPos += (correctionX*inverseMassJ);
						cells.get(j).yPos += (correctionY*inverseMassJ);

						float velx = cells.get(i).xVel - cells.get(j).xVel;
						float vely = cells.get(i).yVel - cells.get(j).yVel;

						float dot = (normalx * velx) + (normaly * vely);

						Log.d("dot", ""+dot);
						float elasticity = 0.9f;
						float scalarJ = -(1+elasticity)*dot;
						scalarJ /= totalinverseMass;
						float impulsex = normalx * scalarJ;
						float impulsey = normaly * scalarJ;

						cells.get(i).xVel += (impulsex*inverseMassI);
						cells.get(i).yVel += (impulsey*inverseMassI);
						cells.get(j).xVel -= (impulsex*inverseMassJ);
						cells.get(j).yVel -= (impulsey*inverseMassJ);

					}
				}


			}