PTC Round 1

Very little to report today, as only two classes met due to early release for parent-teacher conferences. Honors Physics discussed the nature and action of centripetal force and took class time to work through some thought questions centering on centripetal force and circular motion. Tomorrow, gravity! Physical Science B examined the basic definition of machines and what machines can do with force and distance to make work easier. Remember, nothing comes for free – for every multiplication given to you by a machine, it lessens something else. Multiply force, lose distance; multiply distance lose force. Because of this inverse relationship, the formulas for calculating mechanical advantage (MA) are flip-flopped. MA = F_o/F_i or d_i/d_o. Starting tomorrow, we begin to examine the specific simple machines and how they manipulate force and distance to perform work. For both Physical Science B and E – test corrections due tomorrow.

Homework

Honors Physics A: Chapter Review items #27, 28, 34, 36, 38, 53
Physical Science B: Complete test corrections