10 Questions

Another 10 questions over Kinematics 1 (K1).

Questions and Answers

- 1.Which of the following options contain an error?
- A.
V_i = 3.2 j (m/s)

- B.
A = -2.5 j (m/s)

- C.
∆x = 500 (m)

- D.
X_f = -2.5 i (m)

- 2.A car accelerates from 5.0 m/s eastward to 25.0 m/s eastward in a time of 4.0 seconds. What is the acceleration of the car? State your answer to the tenths place.[State your answer in the format: "60.0 i (m/s/s)" or "-15.0 j (m/s/s)", without the quotation marks.]
- 3.A car accelerates from 5.0 m/s eastward to 25.0 m/s eastward in a time of 4.0 seconds. What is the displacement of the car? State you answer to the tenths place.[State your answer in the format: "10.0 i (m)" or "-45.0 j (m)", without the quotation marks.]
- 4.A bus begins at x
_{i}= -5.0 j (m) and travels for 3.0 seconds at v_{avg}= -10.0 j (m/s).- A. ∆x

- A.

- B. x_f

- B.

- 5.A car is driving 30.0 m/s eastward when the driver slams on the brakes. If the rate of acceleration is 5.0 m/s/s westward, then how much space does the car need to come to a complete stop? State your answer to the tenths place; do NOT include direction because I'm asking for distance, not displacement.[State your answer in the format: "20.0 m" or "80.0 m", without the quotation marks.]
- 6.If a car has a negative acceleration, it might be speeding up.
- A.
True

- B.
False

- 7.A bicycle is moving at 1.40 m/s westward and begins to slow at the rate of 0.60 m/s/s. What is the velocity of the bicycle after 1.20 seconds? State your answer to the hundredths place.[State your answer in the format: "-6.55 i (m/s)" or "0.82 j (m/s)", without the quotation marks.]
- 8.A car is driving northward at 18.0 m/s. The driver then begins to accelerate at a constant 2.0 m/s/s northward. Three seconds later, the car has moved 63.0 meters. If we wait an additional 3.0 seconds, will it have moved an additional 63.0 meters (exactly)? That is, will the car move twice the distance in twice the time?
- A.
Yes

- B.
No

- 9.A car travels 80.0 m southward during a 3.6 s period of time, during which it maintains a constant acceleration of 1.5 m/s/s southward. What was the car's initial velocity? State your answer to the tenths place.[State your answer in the format: "26.0 i (m/s)" or "-8.6 j (m/s)", without the quotation marks.]
- 10.A car can be at rest but still have an acceleration.
- A.
True

- B.
False