# ENPH-131--midterm-2006-solutions.pdf - 1 The Figure below...

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1. The Figure below gives the velocity component vas a function of time for a particle moving in rectilinear motion along an axis. It is part of a sine curve. Point 1 has the maximum value on the curve; point 4 has the minimum value; and points 2 and 6 have the same value. a) What is the direction of travel at time t= 0?
b) What is the direction of travel at point 4?
c) At which of the numbered points does the particle reverse its direction of travel?
d) Rank the six points according to the magnitude of the acceleration, greatest first.
3. Person Ais moving forward with velocity vector vas shown in the figure (overhead picture). The total acceleration vector of the person may be either of four vectors a1,a2a3,a4. a)Check the box that correctly explains what is happening to the direction of motion at this moment: ,
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