Paper River Investigation

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Presentation transcript:

Paper River Investigation Chapter 3 Honors Physics 10-28-98 by Dick Heckathorn

Measurement 1 Speed of Stomper Car

Measurement 2 Speed of River

Measurement 3 Width of river

Prediction 1 Speed of Car Going Downstream

Prediction 2 Speed of Car Going Upstream

Prediction 3 Groundspeed when heading across the river Direction when heading across the river

Prediction 4 Direction to head to go directly across

Prediction 5 Time to cross if no current

Prediction 6 Time to cross when heading across (Current)

Prediction 7 Time to cross when going across (Current)

Measurement 4 Ground speed when heading across the river Direction when heading across the river

Measurement 5 Direction to head to go directly across

Measurement 6 Time to cross if no current

Measurement 7 Time to cross when heading across (Current)

Measurement 7 Time to cross when going across (Current)

Quiz Question 1 A boat heads directly across a river 41 m wide at 3.8 m/s. The current is 2.2 m/s. a. What is resultant velocity of the boat? b. How long to cross the river? c. How far downstream is boat when it reaches the other side?

a. 4.39 m/s across 30.1o downstream b. 10.8 sec c. 23.7 m Quiz Question 1 Answers a. 4.39 m/s across 30.1o downstream b. 10.8 sec c. 23.7 m

Quiz Question 2 A boat heads directly across a river 110 m wide at 8.5 m/s. The current is 3.8 m/s. a. What is resultant velocity of the boat? b. How long to cross the river? c. How far downstream is boat when it reaches the other side?

a. 9.31 m/s across 30.1o downstream b. 12.9 sec c. 49.2 m Quiz Question 2 Answers a. 9.31 m/s across 30.1o downstream b. 12.9 sec c. 49.2 m