Learning Goal: To learn to find kinematic variables from a graph of position vs.

Question

Learning Goal: To learn to find kinematic variables from a graph of position vs. time. The graph of the position of an oscillating object as a function of time is shown. Eure 1) Some of the questions ask you to determine ranges on the graph over which a statement is true. When answering these questions, choose the mast complete answer. For example, if the answer "B to D" were correct, then "B to C" would technically also be correct- but you will only recieve credit for choosing the most complete answer. Figure 1 of 1

Explanation / Answer

A) x > 0
parts which are upper the x-axis.

Ans. A to C

b) x < 0

part below x axis,

C to E.

c) point on x-axis,

A , C and E.

d) velocity = slope of x vt t curve.

slope = tan@

@ is angle of tangent at that point making with positive x axis.

from A to B - @ < 90 deg

tan@ > 0

from B to C- @ > 90

tan@ < 0

from C to D - @ > 90

tan@ < 0

from D to E - @ < 90

tan@ > 0

so v > 0 where tan@ > 0

A to B and D to E

E) v < 0 where tan@ < 0

B to D

F) v = where @ = 0 deg

at B and D.

g) where curve is opening donwside a < 0

where curve is opening upwards a >0 .

C to E positive

h)
A to C negative

I) zero at C.

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