Grading Practice Problem:

Problem Set Problem:

(6 points) The Harvard bridge is 364.4 smoots in length. If you start at the MIT end and accelerate uniformly at 1 , how long will it take to reach the Boston end? Justify your answer by showing your work.

Solution Set Answer:

The distance (d) travelled under a uniform acceleration (a) for time (t) is d =. Therefore, the time (t) required to cover distance (d) can be found by rearranging that equation to give: t = . Substituting in the values for d and a gives:

Possible Student Answers:

How many points would you give the following and why?

1) d = 2) t = .

3) 4)

5) 6) Cannot tell from information given.

7) Make up an answer of your own that would be worth more than 0 but less than 6 points.