# Relative acceleration & reference frames

1. Sep 12, 2009

### sonutulsiani

1. The problem statement, all variables and given/known data

1. You are passing another car on a highway and determine that, relative to you, the car you pass has an acceleration toward the west. However, the driver of the other car is maintaining a constant speed and direction relative to the road. Which of the following statements are true?

A. The reference frame of your car is an inertial one.
B. Your car is accelerating towards the east.
C. Your car is accelerating towards the west.
D. Your car is accelerating relative to the other car.

2. Suppose you are in a train. You toss a ball to your friend several seats in front of you. Which of the following statements is true?

A. If the train is moving with constant velocity you can determine the speed of the train from data extracted from the motion of the tossed ball.
B. You can determine whether the train is accelerating by observing the motion of the tossed ball.
C. If the train accelerates to the right, you will see the ball accelerating in the same direction.
D. There is no connection between the motion of the ball and the motion of the train.

2. Relevant equations

In the first question, there are more that one answers possible. It may be 2 or 3.

3. The attempt at a solution

I think:

1. B, C, D
2. D