2D KINEMATICS

This assignment is due before 9 AM, Wednesday, January 27, 1999.

Please type LAST name:

Please type your LAST NAME and LAST FOUR SS# digits (eg: Smith3256):

I received no help from anyone on this assignment.

The following three questions refer to the material you were to read in preparation to the lesson. Questions one and two require you to write a three or four sentence response. Number three is a multiple choice question. Click in the appropriate circle.

You may change your mind as often as you wish. When you are satisfied with your responses, click the SUBMIT HOMEWORK button at the bottom of this page.

1.

Three swimmers start across the river at the same time. They all swim with the same speed relative to the water. Swimmer A swims in a direction perpendicular to the current. Swimmer B swims slightly upstream along a line which makes an 80 degree angle with the shore. Swimmer B swims slightly downstream along a line which makes an 80 degree angle with the shore. Which of the three swimmers reaches the opposite shore first?

2.

The pilot of a small plane is trying to maintain a course due North. His air speed is 120 miles per hour. There is a 10 mph wind from the East. Estimate the direction in which the plane should be pointed to accomplish this.

3.

A 60 mph southwesterly wind, blowing at 30° East of North, has an easterly component of
60 sin60° mph
60 cos30° mph
60 sin30° mph
none of the above.

Below is a space for your thoughts, including general comments about today's assignment (what seemed impossible, what reading didn't make sense, what we should spend class time on, what was "cool", etc.):

You may change your mind as often as you wish. When you are satisfied with your responses click the SUBMIT button.