Final answer:
The position vs time graph for an object that is speeding up is not a straight line but a curve due to increasing speed, which is false. For constant acceleration, the displacement vs time graph is curved, while displacement vs time squared is a straight line, which is true. Option A is correct.
Step-by-step explanation:
The initial statement asks about POR, which is not related to the context of the question. However, analyzing the true and false statements provided:
18. True or False: The position vs time graph of an object that is speeding up is a straight line.
Answer: False. When an object is speeding up, the position versus time graph is not a straight line but rather a curve. The slope of the curve increases with time due to the increasing speed.
31. True or False: Consider an object moving with constant acceleration. The plot of displacement versus time for such motion is a curved line while the plot of displacement versus time squared is a straight line.
Answer: True. For an object moving with constant acceleration, the displacement versus time graph is indeed a curved line (parabolic in shape), which indicates acceleration. Furthermore, when time is squared, it linearizes the graph if acceleration is constant, resulting in a straight line.
33. A car is moving on a straight road at a constant speed in a single direction. Which of the following statements is true?
Since no options are provided for question 33, we cannot answer this part. It is assumed the question is incomplete or the information is missing.
GRASP CHECK
Imagine standing on a platform watching a train pass by. According to Galileo's conclusions, how would your description of motion and the description of motion by a person riding on the train compare?
Answer: (a). I would see the train as moving past me, and a person on the train would see me as stationary. This is an example of relative motion, where each observer sees the other as moving in relation to themselves.
4. Is the following statement true or false? A pebble dropped in water is an example of a pulse wave.
Answer: True. When a pebble is dropped into water, it creates a single disturbance that travels through the water. This kind of wave is known as a pulse wave, as it consists of a single pulse moving away from the point where the pebble entered the water.