if you were to drop a ball outside of a train moving at a constant speed, which observer would see the ball…

if you were to drop a ball outside of a train moving at a constant speed, which observer would see the ball moving in a straight line? ignore air resistance. (choose all that are true)\nthe person who dropped the ball\na person who jumped off the train at the same time the ball was dropped\nsomeone on the train watching the ball\nsomeone who is outside on the ground watching the ball\nsomeone driving a car next to the train with the same velocity as the train

if you were to drop a ball outside of a train moving at a constant speed, which observer would see the ball moving in a straight line? ignore air resistance. (choose all that are true)\nthe person who dropped the ball\na person who jumped off the train at the same time the ball was dropped\nsomeone on the train watching the ball\nsomeone who is outside on the ground watching the ball\nsomeone driving a car next to the train with the same velocity as the train

Answer

Answer:

A. The person who dropped the ball B. A person who jumped off the train at the same time the ball was dropped C. Someone on the train watching the ball E. Someone driving a car next to the train with the same velocity as the train

Explanation:

Step1: Analyze frame - of - reference concept

Inertial frames moving at constant speed relative to each other share the same laws of physics.

Step2: Consider the train - related frames

The person who dropped the ball, the person who jumped off the train at the same time, someone on the train, and the car driver moving at the same speed as the train are all in the same inertial frame (moving with the train's constant speed). In this frame, the ball only has the vertical motion due to gravity and appears to move in a straight line (vertically downwards).

Step3: Consider the ground frame

Someone on the ground is in a different inertial frame. The ball has both the horizontal velocity (same as the train's) and the vertical velocity due to gravity, so it follows a parabolic path for the ground - based observer.