I am having problems with the last part of this question C in regards to 2,3,4 p

Question

I am having problems with the last part of this question C in regards to 2,3,4 position. Can you please show work as I seen several examples, but still don't understand why I am getting it wrong.

Here is the link for the pictures.

https://onedrive.live.com/redir?resid=EF0125DB5CDE97B!30684&authkey=!AKQ-xYbGLNmFrwg&ithint=folder%2cPNG

Pad 10:42 PM S: https://session.masteringphysics.com/myct/itemView? PHYS 211 Summer 2016 elp Close Chapter 2-3 Problem 2.6 Resources « previous 6 of 20 | ne xt » Problem 2.6 A particle starts from 7.0 m at to 0 and moves with the velocity graph shown in the figure. V, (m/s) 12 t (s) Part A Does this particle have a turning point? Yes No Submit My Answers Give Up Correct Part B If so, at what time? Express your answer using two significant figures and include the appropriate units. t= 1.0 s Submit My Answers Give Up Correct Part C What is the object's position at t = 2, 3, 4 s ? Express your answers using two significant figures separated by commas. x2, 3, 4 = Submit My Answers Give Up

Explanation / Answer

Yes. The turning point is where the velocity changes from negative to positive (or vice versa) --
in this case, at t = 1 s.

The change in position is given by the area under the v-t curve (negative change if below t-axis).

Assume the particle begins at rest.
At 1 s, the particle has moved 2 m to the left, to 4 m.
At 2 s, the particle has moved net zero, back to 6 m.
At 3 s, the particle has moved net 6 m, to 12 m.
At 4 s, the particle has moved net 16 m, to 22 m

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