Explaining Movement with Newton's Laws

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An airplane moving at constant velocity will show the dropped ball falling straight down to someone inside, while an observer on the ground will see it follow a parabolic path due to the airplane's forward motion. Newton's First Law explains that you feel the same in a motionless vehicle as in a moving one because both scenarios involve a state of constant velocity, resulting in no net force acting on you. When accelerating forward, Newton's Second Law indicates that you are pressed back into your seat due to the inertia resisting the change in motion. Conversely, during braking, your body continues moving forward due to inertia, causing the sensation of being pushed forward. Understanding these principles is essential for grasping basic physics concepts related to motion.
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1. An airplane is moving with a constant velocity. You are sitting inside the airplane and you drop a ball. Describe what the ball's path looks like to you inside the plane and to someone standing still, observing the action from the ground. (Assume X-ray vision)

2. Use Newton's Laws to explain why you feel the same in a motionless vehicle as you do in a car moving at a constant velocity.

3. Explain using Newton's laws the effect of being pressed back in your seat when accelerating forward and being pushed forward while breaking.

:rolleyes:
 
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Okay, what have YOU done on these? We are happy to help but we won't do your work for you and we want to see some indication that you are trying.
 
shutdown! everyone makes mistakes that is why pencils have erasers. how do you expect to learn material without trying it?
 
The questions are pretty simple, it should be explained in your book.
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
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