Final answer:
The motorcycle moving at a constant speed of 25 m/s past a stationary observer is in uniform motion with no acceleration. For scenarios with acceleration, formulas involving initial speed, final speed, acceleration, and force are applied to determine various motion parameters.
Step-by-step explanation:
The question at hand involves discussing the motion of a motorcycle moving at a constant speed as it passes a stationary observer. So, to answer your question effectively, consider that when an object, such as a motorcycle, is said to move with constant speed, it has a uniform motion, meaning there is no acceleration since its velocity does not change over time. The observer will see the motorcycle maintain its distance with the same increment every second.Let's also address similar scenarios, as indicated by the various parts of your question. If the motorcycle accelerates from an initial speed of 25 m/s at a rate of 4.0 m/s² to reach a speed of 35 m/s in 5.0 seconds, to calculate the initial speed we can use the formula v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Plugging in the values we get, u would be 35 m/s - (4 m/s² × 5 s) which equals 15 m/s, not -34 m/s as initially stated perhaps incorrectly.
If an object has an average acceleration, we can figure this out by dividing the change in velocity by the time taken. For example, if a motorcycle has an initial velocity of 20 m/s and accelerates at 4 m/s², after 12 seconds its final velocity would be v = u + at = 20 m/s + (4 m/s² × 12 s) = 68 m/s. The same formula applies for discovering the force exerted backward by the motorcycle if it accelerates when already in motion. The force can be found using Newton's second law, F = ma, where m is the mass and a is the acceleration.When a motorcycle with a constant speed of 25 m/s passes a stationary observer, we can say that the motorcycle is in uniform motion. In uniform motion, the velocity of an object does not change, so the motorcycle will continue to travel at a speed of 25 m/s as it moves past the observer.