POWER WORKING

I don't have any idea who picked me as the next scribe. So, I went back and traced the trail of scribes. It seemed like it was SERGIO?! Sorry, Sergio. I MEANT BRYAN HAHA! So, We basically finished the CIRCULAR MOTION unit, given that we started working on POWER and WORK.

We learned that:

• WORK is the product of force exerted on an object and the distance the object moves in the direction of the force. It has no direction and is therefore considered a scalar unit. WORK is measured in JOULES. It is calculated using the formula:

W = fd

• POWER is the rate of doing work or the rate at which energy is transferred. Power is measured in WATTS. it is measured using, where t is time:

P = w/t

Today in class, we did two GRUELING labs (just kidding). The first lab was about calculating our own work and power as we go up the stairs. First, the height of the stairs was measured, then the we recorded the amount of time it took for us to climb up the stairs at a constant pace. We needed the mass of the participants so we can calculate force using F = mg.

The second lab involved a cart with one kilogram of weight on it. The cart was held on top of a 30 cm-high incline, and was released going downhill. The time it took for the cart to travel one meter from the base of the incline was recorded. Three trials were done to acquire a much better result. Further calculations were made.

For both labs, questions were answered and were taken home as well because NOBODY finished them. Discussions about work and power will continue on MONDAY! I hope everyone has a great weekend! I'm not having a fun one so far because I got stuck at home.

I think I've covered everything we did in class on Friday. OH WAIT, Mrs. Kozoriz didn't give us candies! Anyway, do your labs over the weekend and see you guys on Monday!

The next scribe is... CRAIG.