ACTIVITY 9 (Experimental investigation): Perform Force and area of contact II this activity in a freshly watered place one brick upright in the soil (Fig. flower bed, where the soil is still soft. First, 11.11a). Remove it to see how deep an impression it has made in the soil. Next, keep two bricks, one on top of the other as shown (Fig. 11.11b). This increases the force exerted on the soil, with the area of contact remaining the same. Is the impression in this case deeper? Why? Now lay the first brick on the soil on its widest base and note the impression it makes (Fig. 11.11c). Is the impression in this case the shallowest? Why?​