Tuesday, September 25, 2007
Monday, September 17, 2007
9/17/2007 A block homework
Speed, Velocity and Acceleration worksheet
1. Hans stands at the rim of the Grand Canyon and yodels down to the bottom. He hears his yodel echo back from the canyon floor 5.20 s later. Assume that the speed of sound in air is 340 m/s. How deep is the canyon at this location?
2. The world speed record on water was set on October 8, 1978 by Ken Warby of Blowering Dam, Austaralia. If Ken drove his motorboat a distance of 1000 m in 7.045 s, how fast was his boat moving a) in m/s? b) in mi/h?
3. According to the World Flying Disk Federation, on April 8, 2000, Jennifer Griffin of Fredricksburg, Virginia threw a Frisbee for a distance of 138.56 m to capture the women’s record. If the Frisbee was thrown horizontally with a speed of 13 m/s, how long did the Frisbee remain aloft?
4. It is now 10:29 a.m., but when the bell rings at 10:30 a.m. Suzette will be late for French class for the third time this week. She must get from one side of the school to the other by hurrying down three different hallways. She runs down the first hallway, a distance of 35 m, at a speed of 3.5 m/s. The second hallway is filled with students, and she covers its 48 m length at an average speed of 1.2 m/s. The final hallway is empty, and Suzette sprints its 60 m length at a speed of 5 m/s.
a. Does Suzette make it to class on time or does she get detention for being late again?
b. Draw a distance vs. time graph of the situation
5. A jumbo jet taxiing down the runway receives word that it must return to the gate to pick up an important passenger who was late to his connecting flight. The jet is traveling at 45 m/s when the pilot receives the message. What is the acceleration of the plane if it takes the pilot 5 s to bring the plane to a halt?
1. Hans stands at the rim of the Grand Canyon and yodels down to the bottom. He hears his yodel echo back from the canyon floor 5.20 s later. Assume that the speed of sound in air is 340 m/s. How deep is the canyon at this location?
2. The world speed record on water was set on October 8, 1978 by Ken Warby of Blowering Dam, Austaralia. If Ken drove his motorboat a distance of 1000 m in 7.045 s, how fast was his boat moving a) in m/s? b) in mi/h?
3. According to the World Flying Disk Federation, on April 8, 2000, Jennifer Griffin of Fredricksburg, Virginia threw a Frisbee for a distance of 138.56 m to capture the women’s record. If the Frisbee was thrown horizontally with a speed of 13 m/s, how long did the Frisbee remain aloft?
4. It is now 10:29 a.m., but when the bell rings at 10:30 a.m. Suzette will be late for French class for the third time this week. She must get from one side of the school to the other by hurrying down three different hallways. She runs down the first hallway, a distance of 35 m, at a speed of 3.5 m/s. The second hallway is filled with students, and she covers its 48 m length at an average speed of 1.2 m/s. The final hallway is empty, and Suzette sprints its 60 m length at a speed of 5 m/s.
a. Does Suzette make it to class on time or does she get detention for being late again?
b. Draw a distance vs. time graph of the situation
5. A jumbo jet taxiing down the runway receives word that it must return to the gate to pick up an important passenger who was late to his connecting flight. The jet is traveling at 45 m/s when the pilot receives the message. What is the acceleration of the plane if it takes the pilot 5 s to bring the plane to a halt?
Friday, September 14, 2007
9/14/2007 A block homework
Speed and Velocity Assignment
1. This weekend I went to Chicago to visit my cousin. The trip’s distance is 1500 miles and it will take 300 hours.
a. What is the average speed?
b. So the average speed is _________. Does this mean that I will move at exactly _______ every second of the trip?
c. Explain the difference between average speed and instantaneous speed:
2. So far we have considered speed and velocity to be the same. How is velocity different from speed?
3. What is speed and how do we calculate it?
4. Kelly is able to ride her bike 200 meters in 20 seconds. What is her speed?
5. If she continues to ride her bike at that speed, how long will it take her to travel 2400 meters?
6. If Kelly continues to ride at the same speed, how far can she travel in one hour?
1. This weekend I went to Chicago to visit my cousin. The trip’s distance is 1500 miles and it will take 300 hours.
a. What is the average speed?
b. So the average speed is _________. Does this mean that I will move at exactly _______ every second of the trip?
c. Explain the difference between average speed and instantaneous speed:
2. So far we have considered speed and velocity to be the same. How is velocity different from speed?
3. What is speed and how do we calculate it?
4. Kelly is able to ride her bike 200 meters in 20 seconds. What is her speed?
5. If she continues to ride her bike at that speed, how long will it take her to travel 2400 meters?
6. If Kelly continues to ride at the same speed, how far can she travel in one hour?
Thursday, September 13, 2007
Wednesday, September 12, 2007
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