Practice Question - Acceleration

Prompt:
Ann, a physics student, decides to measure the acceleration in her car. She decides to hang a bob (pendulum) from the rear view mirror in her car. It can swing towards the front of the car, which she measures as theta, or towards the rear of the car, which she measures as negative theta.

(diagram)

Questions

What angle will the bob make when Ann, after moving forward at a constant speed, brakes?
A. Positive theta
B. Zero
C. Negative theta
D. There is not enough information provided to answer this question

Ann graphs the angle of the pendulum over a period of time.
(second graph)

At period 4, the car's speed was
A. Increasing
B. Constant
C. Decreasing
D. There is not enough information provided to answer this question

Over the whole time period, the car was stationary:
A. During period 1 only
B. During period 3 only
C. During period 6 only
D. There is not enough information provided to answer this question