Review that pressure is force per unit area, and that weight is a force. The pressure exerted by a block of wood on a table is determined by the weight of the block (mass x gravity) divided by the area in contact with the table. A container of liquid exerts a liquid pressure determined by the weight of the liquid and the area of the bottom of the container. Mass depends on the amount of matter and the volume, which is also the density. The pressure exerted by a liquid on a container is dependent upon gravity, the density, and the depth of the liquid. The greater the density, the greater the pressure exerted by equal volumes of liquid, in a direct proportion. Since the density is constant for a given liquid, and the volume can be kept constant, the depth of the liquid in a container will determine the pressure. The greater the depth, the greater the pressure.

The determination and definition of specific gravity was used to determine the density of a substance. The concept of elasticity, what makes something elastic, the determination of stretch in springs being directly proportional to the applied force. This was explained as Hooke's law. The elastic limit was illustrated by using drawings of springs and masses attached.

I introduced Marcel to the physics definition of work as the net force applied multiplied by the distance the object moves multiplied by the cosine of the angle between the applied force and the direction of movement. We did some problems to reinforce the lesson and I assigned Marcel some further problems to increase his knowledge.

I guided Eecho through problems involving potential and kinetic energy, mass, velocity, acceleration, and forces. I showed him how to use the spring formula and I monitored his knowledge of problems with friction in moving vehicles. There was no assignment.

Marcel finished his test on motion, force, and laws of motion. The test included problems involving free fall, friction, net forces, and forces in two dimensions. Marcel scored a 110% with the bonus question.
After the test, we performed a lab which found experimental values for various coefficients of static friction. We used different materials.
There was no assignment.

The lesson outline from last week was finally accomplished. This study of solids included shape and volume, crystal solid structure shown through diagrams and photomicrographs, the meaning and determination of density, as well as the comparisons of densities among different solids, and the meaning of those differences. Factors which affect density, temperature and pressure were discussed. The density of water as a liquid and solid along with specific gravity determination and meaning was discussed.

Marcel continued to work on his test on forces and laws of motion. The
problems he solved included net force problems with friction, net force problems with the resultant in two dimensions, and free fall problems with air friction. He did not finish his test yet. There was no assignment.

lesson outline is same as previous days

I worked with Eecho on problems given by his teacher. The problems included required stopping distances and reaction time, circular motion, acceleration, average and final velocity, precision and accuracy, and frictionless motion. We covered several practice sheets. There was no assignment.

Marcel continued taking his test on force and motion. Problems required the use of formulas for friction, components of forces on an incline, gravity, force equations, and resultant forces. He did not finish the test yet. There was no assignment.