Dynamics Test
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Showing posts with label dynamics. Show all posts
Showing posts with label dynamics. Show all posts
Thursday, March 4, 2010
Thursday, February 25, 2010
Wednesday, February 24, 2010
February 24, 2010
Hi classmates,
Today, Miss K just gave us time to study and answer the review worksheet (Newton's second law). Be sure to complete it for tomorrow because we're gonna go over it. :)
Don't forget.. We have test on Friday (Dynamics Unit)
The next lucky scribe is Yassin. :)
Today, Miss K just gave us time to study and answer the review worksheet (Newton's second law). Be sure to complete it for tomorrow because we're gonna go over it. :)
Don't forget.. We have test on Friday (Dynamics Unit)
The next lucky scribe is Yassin. :)
Tuesday, February 23, 2010
coefficient of friction
lab in coefficient of friction
objective: to determine the value of the coefficient of friction
materials: spring scale, wooden board, level board, and protractor.
to find the F parallel: Fparallel sin teta
to find the F perpendicular: Fperpendicular cos teta
Fg=mg
to find the coefficient of friction: coefficeint of friction = F parallel / F perpendicular
to find the tan teta: F parallel / F perpendicular
suzii to scribe next
objective: to determine the value of the coefficient of friction
materials: spring scale, wooden board, level board, and protractor.
to find the F parallel: Fparallel sin teta
to find the F perpendicular: Fperpendicular cos teta
Fg=mg
to find the coefficient of friction: coefficeint of friction = F parallel / F perpendicular
to find the tan teta: F parallel / F perpendicular
suzii to scribe next
Monday, February 22, 2010
Sunday, February 21, 2010
Scribe for the 19th
Hey everyone, I hope you're having a good weekend.
So on Friday we started off by going over the 4 questions at the end of the dynamics unit booklet. So here is an explanation of the answers (they can also be found on the previous slide if my explanation doesn't make sense.)
1.a) No it can't be at equilibrium because the object will accelerate according to Newtons second law (A body will accelerate with acceleration proportional to the force and inversely proportional to the mass)
b) An example of something that is mutually perpendicular is an arrow pointing up and an arrow pointing to the left. This could not be at equilibrium as the sum of the two arrows would not equal zero.
c) An object acted upon by two not mutually perpendicular forces may be at equilibrium IF the forces look like this <---.---> This is an example of equilibrium because the sum of the forces would equal zero. However not mutually perpendicular forces aren't always at equilibrium. If the sum of the forces is not equal to zero (an arrow pointing northeast and an arrow pointing south) then they object acted upon is not at equilibrium.
2. To answer this question we must use the formula 2Ft- Fg= 0
Which we rearrange to become 2Ft= Fg
Fg is equal to mass times gravity so we can rewrite it like this, 2Ft= mg
Now plug in your values. 2Ft= (12.0kg)(9.8N/Kg)
Ft= 58.8N
3. The free body diagram for this question is (Ft) <------. ------> (Fa)
We use the formula -Ft + Fa= 0
Which can be rearranged to become -Ft= - Fa
We know that Fa = 35 N which means that Ft also equals 35 N
We are trying to solve for mass so we will write Ft= mg
m= 35N/(9.8 N/Kg)
m= 3.6 Kg
4. For this question we were trying to find the y component of the vector. (that would be the green arrow in the diagram on the previous slide) These green arrows represent the force of the tension in the wire, this force must be equal to the Fg otherwise she would not be at equilibrium. We used sine to solve for the y value because we knew one angle, remember Sin= opposite / hypotenuse.
We then corrected the Net Force worksheet. Here are the answers.
We then got a worksheet with 5 questions about dynamics. It would probably be wise to do this worksheet since I believe we are correcting it tomorrow. (:
Next scribe will beee Wahida.
So on Friday we started off by going over the 4 questions at the end of the dynamics unit booklet. So here is an explanation of the answers (they can also be found on the previous slide if my explanation doesn't make sense.)
1.a) No it can't be at equilibrium because the object will accelerate according to Newtons second law (A body will accelerate with acceleration proportional to the force and inversely proportional to the mass)
b) An example of something that is mutually perpendicular is an arrow pointing up and an arrow pointing to the left. This could not be at equilibrium as the sum of the two arrows would not equal zero.
c) An object acted upon by two not mutually perpendicular forces may be at equilibrium IF the forces look like this <---.---> This is an example of equilibrium because the sum of the forces would equal zero. However not mutually perpendicular forces aren't always at equilibrium. If the sum of the forces is not equal to zero (an arrow pointing northeast and an arrow pointing south) then they object acted upon is not at equilibrium.
2. To answer this question we must use the formula 2Ft- Fg= 0
Which we rearrange to become 2Ft= Fg
Fg is equal to mass times gravity so we can rewrite it like this, 2Ft= mg
Now plug in your values. 2Ft= (12.0kg)(9.8N/Kg)
Ft= 58.8N
3. The free body diagram for this question is (Ft) <------. ------> (Fa)
We use the formula -Ft + Fa= 0
Which can be rearranged to become -Ft= - Fa
We know that Fa = 35 N which means that Ft also equals 35 N
We are trying to solve for mass so we will write Ft= mg
m= 35N/(9.8 N/Kg)
m= 3.6 Kg
4. For this question we were trying to find the y component of the vector. (that would be the green arrow in the diagram on the previous slide) These green arrows represent the force of the tension in the wire, this force must be equal to the Fg otherwise she would not be at equilibrium. We used sine to solve for the y value because we knew one angle, remember Sin= opposite / hypotenuse.
We then corrected the Net Force worksheet. Here are the answers.
We then got a worksheet with 5 questions about dynamics. It would probably be wise to do this worksheet since I believe we are correcting it tomorrow. (:Next scribe will beee Wahida.
Friday, February 19, 2010
Thursday, February 18, 2010
THURSDAY, FEBRUARY 18TH, 2010
Hey Guys,
Well today we went over the answers to yesterday's test on acceleration and started a new unit. If you missed some of the solutions to the test questions, they have been posted on the previous slide.
So we read through the "Dynamics Unit" booklet, handed out yesterday, and learned about the different forces that act on objects. There are 4 questions on the last page of the handout which should be completed by tomorrow. *I would personally suggest that you do all homework that is assigned this semester if you want to recieve a high grade. The course isn't very hard in my opinion, but neglecting homework will really affect your mark. Remember practice makes perfect! :)
We also quickly went over the handout on Little Nellie Newton. I believe the answers have been loaded to the blog. If not ask a friend or the person who sits beside you in class to tell you the answers.
At the end of the period, we were given two new assignments regarding dynamics. They should also be completed by tomorrow.
I'm pretty sure that there will be a test not next week, but the week after on this unit, so make sure you pay attention and do your work, because the test we did yesterday is probably the easiest test we're going to write.
The next scribe will be Rebecca! :)
Well today we went over the answers to yesterday's test on acceleration and started a new unit. If you missed some of the solutions to the test questions, they have been posted on the previous slide.
So we read through the "Dynamics Unit" booklet, handed out yesterday, and learned about the different forces that act on objects. There are 4 questions on the last page of the handout which should be completed by tomorrow. *I would personally suggest that you do all homework that is assigned this semester if you want to recieve a high grade. The course isn't very hard in my opinion, but neglecting homework will really affect your mark. Remember practice makes perfect! :)
We also quickly went over the handout on Little Nellie Newton. I believe the answers have been loaded to the blog. If not ask a friend or the person who sits beside you in class to tell you the answers.
At the end of the period, we were given two new assignments regarding dynamics. They should also be completed by tomorrow.
I'm pretty sure that there will be a test not next week, but the week after on this unit, so make sure you pay attention and do your work, because the test we did yesterday is probably the easiest test we're going to write.
The next scribe will be Rebecca! :)
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