10 Questions

The following questions cover the content in Kinematics 2 (K2).

Questions and Answers

- 1.Position vs time data for a car has been collected and plotted, yielding the trend line y = -2x
^{2}+ 16x + 8. Assume the car is heading eastward. What is the car's acceleration?- A.
-2 i (m/s/s)

- B.
-4 i (m/s/s)

- C.
8 i (m/s/s)

- D.
16 i (m/s/s)

- E.
None of the above

- 2.Considering the same car, with the trend line y = -2x
^{2}+ 16x + 8, what is the car's velocity at t = 1 second? State your answer to the units place.[State your answer in the format: "24 i (m/s)" or "-8 i (m/s)", without the quotation marks.] - 3.In which of the following scenarios will the object be slowing down?
- A.
V_i = 5 i (m/s) and a = 2 i (m/s/s)

- B.
V_i = -8 i (m/s) and a = 2 i (m/s/s)

- C.
V_i = -8 i (m/s) and a = -2 i (m/s/s)

- D.
V_i = 5 i (m/s) and a = -2 i (m/s/s)

- 4.Characterize the motion of an object by analyzing its position vs time graph.(Check each box that is correct.)
- A.
It's heading forward.

- B.
It's heading backward.

- C.
It's speeding up.

- D.
It's slowing down.

- 5.Which of the following answer choices shows an object slowing down? Choose all that apply.
- A.
Option1

- B.
Option2

- C.
Option3

- D.
Option4

- 6.A position vs time plot of a northbound car yields the trend line y = 4x
^{2}+ 10. At what time does the object have a position of 46 j (m)? State your answer to the tenths place and put the units in parenthesis.[State your answer in the format: "1.6 (s)" or "5.0 (s)", without the quotation marks.] - 7.A car's velocity vs time graph yields the trend line y = 5x + 2. Which of the following equations of motion is accurate?
- A.
∆x = 5t + 1t^2

- B.
∆x = 2t + 10t^2

- C.
∆x = 2 + 2.5t^2

- D.
∆x = 2t + 2.5t^2

- E.
∆x = 2 + 5t^2

- 8.A car's position vs time plot yields the trend line y = 3.5x
^{2}+ 10x + 2. Which of the following equations of motion is accurate?- A.
V_f = 10t + 3.5

- B.
V_f = 7t^2 + 10t + 2

- C.
V_f = 7t + 10

- D.
V_f = 3.5t + 10

- E.
V_f = 20t + 3.5

- 9.Which of the following velocity vs time graphs corresponds with the position graph shown?
- A.
Option 1

- B.
Option 2

- C.
Option 3

- D.
Option 4

- 10.A northbound car's position vs time plot yields the trend line y = -4x
^{2}+ 20x + 10. What is the displacement (not position) of the car at 2 seconds? State your answer to the units place.[State your answer in the format: "16 j (m)" or "-30 j (m)", without the quotation marks.]