Test 2 – Velocity & Acceleration

I.Matching (2) A. scalar quantity F. acceleration G. vector quantity H. displacement D. velocity I. rate E. distance J. speed

___9. Ratio of rise to run. A description of the steepness of a line on a graph. ___10. The rate of change of acceleration.

II. Conversions (2)

11kg = _____________________ g

274kg = ________________________ mg

8.1kN = ____________________ N

274μm = ________________________cm

III. Provide the SI base units for each concept. (2)

speed _______ mass _______

Volume _______ velocity _______

acceleration _______ displacement _______

IV. Tell at least 3 things about each graph. In other words, what do we know about the object, and its motion, just by looking at the graph? What can we interpret? Be as specific as possible so that you aren't redundant. (3)

V.What is the slope of the data? Oops, its not a line. I guess you should use a best fit line. (10)

VI. Problems -- All problems involve the same 400m track. Only one race is run, and it involves only one lap with two runners. (2) __________1. What is the distance traveled by the runners? __________2. What is the displacement of the runners at the end of the race? __________3. If Runner A finished in 70s, what was her average speed? __________4. If Runner B finished in 69s, what was her velocity?

VII. Problems – show equations and all work. (4)

____________1. If a bike goes from 10m/s to 18m/s in 6s, what is its rate of acceleration?

____________7. If an Eastbound truck going 20m/s begins to accelerate at a rate of 0.96m/s2, how far does it travel in 12s?

VIII. Discussion- Write in complete sentences

1. Explain in your own words the difference between Velocity and Speed.

2. Prove that V=d/t is equal to m=y2-y1/x2-x1.

IX. Scientific Method - List the five main steps we discussed in class.

1.

2.

3.

4.

5.

X. Experimental Design

Explain in detail what is a(n):

1. Independent variable

2. Dependent variable

3. Control Group