Final answer:
Speed adjustments are important for safe driving and the statement that these should be made according to various factors such as objects, road, and environmental conditions is true. The position vs. time graph for an accelerating object is curved, not straight. Objects moving with constant acceleration have a curved displacement vs. time graph, but a straight line when plotted against time squared.
Step-by-step explanation:
Speed adjustments should indeed be made according to objects in the path of travel, road conditions, and environmental conditions. The true or false statement in question is true. When driving, it is crucial to consider all these factors for safety and to conform with traffic laws. For instance, on a wet road, the stopping distance will be longer due to reduced traction, thus requiring lower speeds. Additionally, environmental conditions like fog or heavy rain can impair visibility, prompting a need for speed adjustments.
Now, let's look at some physics concepts related to motion.
The position vs time graph for an object that is speeding up will not be a straight line. Instead, this graph will show a curve that gets steeper over time, which means the answer is false. This curve represents increasing velocity.
For an object moving with a constant acceleration, the displacement versus time graph is indeed a curved line because the displacement increases at a non-constant rate. But when we plot displacement versus time squared, the graph is a straight line, indicating a constant rate of change in the squared time intervals. So, the statement is true.
In terms of motion, Newton's Third Law of Motion states that for every action (force) in nature there is an equal and opposite reaction. While walking, a person exerts a force on the ground (F1), and the ground exerts an equal and opposite force (F2) back on the person, which allows for forward movement. Therefore, this statement is also true.