Main Question or Discussion Point
Why do we lean towards left when the bus moves along a curved road to right.
Because your body has a natural instinctive response to resist external forces to stay upright and keep the vision-plane level. When you go around a corner in a moving bus, your body's inertia tends to keep it going straight in accord with the Newton's first law. However, since you are inside the turning bus, it doesn't feel to you as if you are just going straight, it feels like you are being pulled toward the outside wall of the bus as it goes around the turn. This apparent "force" is what you are working against when you lean "into" the turn.Why do we lean towards left when the bus moves along a curved road to right.
What makes you think this is the absolute way to see the situation?When the entire world moves to the right and you stay in place
Not always. Consider free fall under gravity. You don't feel any force.The question is why do you feel a force when you accelerate
You are not accelerating in free fall however. You are only accelerating when you are on the ground.Not always. Consider free fall under gravity. You don't feel any force.
You will feel it, if its not a volume force(a beautiful term I saw in the Fundamentals Of Physics book by Resnick, Halliday).
You are not accelerating in free fall.What? Care to explain what you have posted?
http://en.wikipedia.org/wiki/Free_fall" [Broken] article on free fall.LastConjugate said:You are not accelerating in free fall.
You better understand what is acceleration first.Near the surface of the Earth, an object in free fall in a vacuum will accelerate at approximately 9.8 m/s2, independent of its mass
Gravity isn't getting canceled here. A mass m under free fall near earth is subjected to a force of mg.It is not taking into account the cancellation of gravity
Mass per se does not *resist* acceleration. However huge an object might be and however negligible a force might be, the object will suffer a non-zero infinitesimal acceleration.Mass resists acceleration, we have mass, so we feel this resistance.
Correct, though resistance is a good word for explaining the effect. A larger base resists the rise of the water level.Mass per se does not *resist* acceleration. However huge an object might be and however negligible a force might be, the object will suffer a non-zero infinitesimal acceleration.
Its a little like filling a container. Have one with a huge base? a given quantity of water will produce only a small increase in level. Small base? The same quantity of water will produce a significant increase in level. That doesn't mean the base factor is *resisting* the water filling process. There will inevitably be an increase in level, however small.