In Class Calc Based Plus Minus Sign Diagram Problem With Solution F2020 PDF

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Download In Class Calc Based Plus Minus Sign Diagram Problem With Solution F2020 PDF

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An experimental trolley car is observed moving along a straight line parallel to the x axis. component of the trolley’s velocity is given by

3t 2  27t  54  m , s

The scalar x

where t is the number of seconds since

observations began . At t = 0, the trolley’s x position coordinate is + 5 m. 21. The trolley is moving in the negative x direction for a. 3  t  6 . b. t > 6. c. t < 3.

22. At t = 1 second, the trolley is located at a. + 54 m. b. - 21 m.

d. t < 4.5 .

c. + 46.5 m.

d. + 30 m.

e.

3 t  6 .

e. 41.5 m.

23. At t = 5 seconds, the trolley is a. slowing down while moving in the negative x direction. b. accelerating but not moving.. c. speeding up while moving in the negative x direction. d. slowing down while moving in the positive x direction. e. speeding up while moving in the positive x direction.

5A...