In today's class, we got out assignments back, which we handed in yesterday. Yay! Okay so after that, we went over questions 21-26 on the sheet we received yesterday. Those questions were pretty straight forward, so there's no reason to go over them. If you need a reference see slide one.
Next, we moved onto Relative velocities in our textbooks found on page ninety five. Ms. K. put the words "Relative Motion" and "Reference frame" onto the smartboard. We then had a little discussion on what each term was. She also asked us to explain it in our own words. It was also in the textbook. Just incase anyone missed it...
Relative motion - the motion of an object or a person in respect to another object/person.
Reference frame (or frame of reference) - the object or system with respect to which velocity is measured.
After a bit of story time from Ms. K., she then moved on to explaining the different cases of Tarzan, etc. [Slide 2]
Case 1
This case dealt with Tarzan. [Slide 3]
Case 2
This case dealt with Tarzana and was similar to Tarzan's but it had an extra step which involved using the tan function to find the direction [angle]. [Slide 4]
After that, we seemed to get the gist of it. So we went through question three but not in extensive detail. Next we were given an assigment on page 116: 37-42. which can be found on slide 5.
Since I'm feeling generous I will type out all of the questions onto here.
37. A boat wishes to travel east. If there is a current of 10km/h flowing north and the boat is capable of travelling at 30km/h, find the heading and velocity of the boat as seen by a person on the shore.
38. A plane is seen to travel in a direction [S30°W]. If it's ground velocity was 300km/h and the wind speed is 150km/h south, what is the plane's velocity relative to the air?
39. A boat wishes to cross a lake and end up directly south of where it started. The boat is capable of moving 340km/h. If there is a current of 8.0km/h flowing to the west, find
a) the heading the boat must take in order to successfully complete the trip
b) the velocity relative to the ground
40. How much faster is it to point yourself and swim directly across instead of fighting the current and swimming directly across if the width of the river is 100km, you are capable of swimming at 2.2m/s and there is a current of 1.6m/s?
41. A large cruise boat is moving at 15km/h east relative to the water. A person jogging on the ship moes across the ship in a northerly direction at 6km/h. What is the velocity of the jogger relative to the water?
42. A shortstop running at 2.om/s towards third base catches and throws a ball toward homeplate at 35m/s. If the shortstop and catcher are lined up in a direct line at sight when the shortstop throws the ball,
a) at what angle to his body should he throw in order for the ball to move in a straight line directly from him to the catcher?
b) if the distance the ball travels is 20m, how long does the ball take to get to the catcher?
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Just a few reminders:
*sign up for the blog if you haven't already by e-mailing Ms. K.
*use labels in scribe posts.
*try to go beyond your limits while doing scribe posts. [use graphics/different colours/fonts/explanations]
*do your homework.
*Vincent's tomorrow's scribe.
*We will have a test on Thursday.
---hopefully you all got something out of this...=) because that would be super awesome and if I made a mistake, please let me know, so I can fix it toute de suite [right away].
This case dealt with Tarzana and was similar to Tarzan's but it had an extra step which involved using the tan function to find the direction [angle]. [Slide 4]
After that, we seemed to get the gist of it. So we went through question three but not in extensive detail. Next we were given an assigment on page 116: 37-42. which can be found on slide 5.
Since I'm feeling generous I will type out all of the questions onto here.
37. A boat wishes to travel east. If there is a current of 10km/h flowing north and the boat is capable of travelling at 30km/h, find the heading and velocity of the boat as seen by a person on the shore.
38. A plane is seen to travel in a direction [S30°W]. If it's ground velocity was 300km/h and the wind speed is 150km/h south, what is the plane's velocity relative to the air?
39. A boat wishes to cross a lake and end up directly south of where it started. The boat is capable of moving 340km/h. If there is a current of 8.0km/h flowing to the west, find
a) the heading the boat must take in order to successfully complete the trip
b) the velocity relative to the ground
40. How much faster is it to point yourself and swim directly across instead of fighting the current and swimming directly across if the width of the river is 100km, you are capable of swimming at 2.2m/s and there is a current of 1.6m/s?
41. A large cruise boat is moving at 15km/h east relative to the water. A person jogging on the ship moes across the ship in a northerly direction at 6km/h. What is the velocity of the jogger relative to the water?
42. A shortstop running at 2.om/s towards third base catches and throws a ball toward homeplate at 35m/s. If the shortstop and catcher are lined up in a direct line at sight when the shortstop throws the ball,
a) at what angle to his body should he throw in order for the ball to move in a straight line directly from him to the catcher?
b) if the distance the ball travels is 20m, how long does the ball take to get to the catcher?
-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-
Just a few reminders:
*sign up for the blog if you haven't already by e-mailing Ms. K.
*use labels in scribe posts.
*try to go beyond your limits while doing scribe posts. [use graphics/different colours/fonts/explanations]
*do your homework.
*Vincent's tomorrow's scribe.
*We will have a test on Thursday.
---hopefully you all got something out of this...=) because that would be super awesome and if I made a mistake, please let me know, so I can fix it toute de suite [right away].
1 comment:
WOW! You showed them how to Scribe it up! LOL
awww mannn... now I everyone has to spend 4 hours on the scribe post... nice job =P
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