Physics 163

Unit 1: One-Dimensional Kinematics

Problem Set C

Multiple Choice:

Which of the following statements are true? Choose all that apply by listing their letter in alphabetical order with no spaces, commas, or other marks between letters.

a. Suppose that a line on a velocity-time graph starts at some given 'y-coordinate' (say 2 m/s), slopes upward to a higher point, and then back downward to the initial 'y-coordinate.' This would be representative of an object moving away from its original position and later returning to it.

b. The displacement of an object can be found on a velocity-time graph by measuring the total area between the curve and the time-axis; this value can be either + or -.

c. A straight, diagonal line on a velocity-time graph represents an object moving with a constant acceleration.

d. A straight-diagonal line which extends across the time-axis on a velocity-time graph represents an object which slows down, changes direction and then speeds up.

e. A straight, diagonal line on a velocity-time graph represents an object moving with a constant velocity.

f. An object which moves in the negative direction and slows down would be represented on a velocity-time graph by a line with negative slope.

g. If an object moves with a negative velocity and slows down, then its acceleration is negative.

h. If an object moves in the negative direction and slows down, the velocity-time graph would be an upward-sloping line located beneath the time axis.

i. A horizontal line on a velocity-time graph represents an object which is not changing its velocity.

j. The slope of a line on a velocity-time graph is representative of an object's acceleration.

(List the letters of all TRUE statements in alphabetical order; no spaces; no punctuation marks.)

TIP:

Given the randomness of this question, there is currently no help available for it. Because the question is very conceptually-oriented, you would benefit from reviewing information about velocity-time graphs as found in your textbook, your packet (curricular materials) or online.

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