Question about inertial and non inertial frames

[parshyaa]

Suppose a person A is standing in a bus and bus is accelerating forward then when a person B standing outside observes A he see that A is accelerating in forward direction then there must be a force acting on him which is making him accelarating(because Newtons first law holds in Earth's frame) and he asks him hey A are you feeling a force
Then what will A reply to B?
Assume that he is standing on skates so that friction force is 0.

 

[Orodruin]

If the friction is zero he is not going to accelerate. Where would the force come from?

 

[parshyaa]

If the friction is zero he is not going to accelerate. Where would the force come from?

This is the point
As bus is accelarting so as person A is accelarting with respect to B but person A is not feeling any force then Newtons first law is getting fail in inertial frame
I know something is wrong in my statement, so please point it to me

 

[Dale]

Assume that he is standing on skates so that friction force is 0.

As bus is accelarting so as person A is accelarting with respect to B

How you have described it A is not accelerating wrt B. The bus is accelerating, but A is just rolling to the back of the bus. The bus’ acceleration is not magically transferred to A: no friction, no acceleration

 

[parshyaa]

How you have described it A is not accelerating wrt B. The bus is accelerating, but A is just rolling to the back of the bus. The bus’ acceleration is not magically transferred to A: no friction, no acceleration

Sorry i didn't understand the point

This is the point
As bus is accelarting so as person A is accelarting with respect to B but person A is not feeling any force then Newtons first law is getting fail in inertial frame
I know something is wrong in my statement, so please point it to me

I think something is wrong here

 

[Orodruin]

Sorry i didn't understand the point

If there is no friction, then there is no force to accelerate A along with the bus. It is just that. A will not accelerate with the bus unless there is a force of friction.

 

[jbriggs444]

Sorry i didn't understand the point

You have assumed that

1. The bus is accelerating.
2. Person A in the bus is accelerating with the bus.
3. Person A feels no force causing the acceleration.

At least one of those assumptions is wrong. Whenever I am on a bus that is accelerating, I feel a force and have to lean forward to maintain balance.

If person A is in the aisle, standing on skates, someone had better open the back door. Because he is going to slide out.

 

[parshyaa]

If there is no friction, then there is no force to accelerate A along with the bus. It is just that. A will not accelerate with the bus unless there is a force of friction.

Ohh sorry man
This answered my question
Actully i haven't studied the concept of friction so i was having some misconceptions with friction, sorry for this point less question

 

[sophiecentaur]

How Foolish question was this

Not foolish - just a process of getting some understanding.

 

[jtbell]

Try a little experiment. Lay a sheet of paper on a table top, and put a ball on the paper. Quickly pull (accelerate) the paper horizontally. What happens to the ball? Does it move along with the paper, or does it keep the same position, rolling while the paper passes underneath it?

The result may not perfectly match either description, but which one comes closer?

 

[Khashishi]

Have you ridden a bus? What happens if you aren't holding on anything and the bus moves forward?

 

[Dipti]

Suppose a person A is standing in a bus and bus is accelerating forward then when a person B standing outside observes A he see that A is accelerating in forward direction then there must be a force acting on him which is making him accelarating(because Newtons first law holds in Earth's frame) and he asks him hey A are you feeling a force
Then what will A reply to B?
Assume that he is standing on skates so that friction force is 0.

If there was no friction between A's foot and the bus, A would not have accelerated with respect to B. But from A's point of view, B is accelerating backward.

 

[parshyaa]

If there was no friction between A's foot and the bus, A would not have accelerated with respect to B. But from A's point of view, B is accelerating backward.

Yes, discussion is already over