This week we learned about forces that are balanced/unbalanced. This was demonstrated by a pulley system and a car on frictionless track with a weight attached to it. We also studied graphs that the motion sensor gave us for the car. Then we took an assesment on the last day of the week that tested us on how well we knew how forces acted on an object.
The pulley system consisted of two weights on either side of a wheel. The wheel supported the string that was holding the weights up. We were shown that if you drop one weight the other weight will go upwards at the same speed. The weights were both the same mass. This demonstrated that balanced forces will have a constant speed.
The car on the frictionless track demonstrated that it would be pulled at the same speed as the weight dropping. The weight had all of the force on the car, since there was no friction. We used a motion sensor to graph the movement of the car. The graph showed that the car reached a top speed before it got stopped by the end of the track. Along with the pulley system, it also demonstrated that balanced forces will have a constant speed.
Overall, I think this week was good. I understood most of the information. I was also able to apply it to the assesment that we took on friday. I'm really not sure how I did, but it felt like I did alright.
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