11-19

Physics 11-19 Good evening this is News 8 at five. We are here today on the scene at Manheim Township High School. Today we are here visiting Mr. Mannings Physics class. When reporters arrived at the scene they found Mr. Manning and his seventh period physics class beginning with a daily question. If you were to look on the boad the daily question read, Mr. P attempted to slide a three kilogram object across the floor with ten Newtons of force. All of the sudden, that same object was now sliding at a constant speed. Mr. P joyfully needed to push with only five Newtons of force. Find the static force pluse and the kenetic force. One of the students explained the first step saying, " Natural force equals the mass of the object times gravity. So F N equals three times nine point eight. When you do this multiplication you get an answer of twenty nine point four Newtons." Mr. Manning replied saying, " Good job what step is next?" Another student then happily raised her hand and said, " THe next step is to fintd teh static force. To find the static force you do myou s equals the static friction divided by thte natural force. Then you plug in the numbers and the equation would be myou s equals ten Newtons divided by twenty nine point four Newtons, twenty nine point four Newtons is what we found in the first step. After dividing the static friction and the natural force you get an answer of point three four. This is how much kenetic force was applied." It was reported by a student in the class that the next step to find the kenetic force was myou k equals kenetic friction divided by the natural force. The student then told us that when you plug in the values you should have five Newtons divided by twenty nine point four Newtons. The same student said that the answer was point seventeen and that is now much kenetic force there was on the object. After Mr. Manning and his class did the daily question they reveiwed for a test that they were going to have on Friday 21, 2008. All of the students had p icked up a worksheet at the beggining of class that was titled More Force Problems which was page twenty seven. Now since the people here at news 8 were curiouse on how to do a problem on the work dheet we asked Mr. Manning to go over it with the class. The question we asked him to go through was question number two on page twenty seven. One of the students read the question, "Danny Diver (mass = seventy kilograms) is accelerated upward by a diving board at five point zero meters per second squared. How much force is the diving board applying to Danny?" Now since some of the members of news 8 had taken physics they asked if they could take a crack at this question. Mr. Manning and the class replied as to be their guest. so our camera man said that the first thing to do would be to multiply seventy and nine point eight to get the weight which would be negavie six hundred eighty six Newtons. The assistant camera man then suggested that we are looking for the net force. So then we did sigma F equals mass times acceleration and get three hundred fifty. Then i suggested that we then do sigma F equals force one plus force two and when you plug the numbers in you get negative six hundred eighty six pluse F2 and when you add positive six hundred eighty six ti both sides you get one thousand thirty six Newtons. So the net force is one thousand thirty six Newtons. Mr. Manning then replied saying that thats right great job. Mr. Manning and his class then worked on the rest of their work sheet for the rest of the period. This is all the time we have this is Jenelle Stelson reporting at five thirty here on News 8. See you at 11. (Amanda Rivera)