All Questions
Tagged with inertia reference-frames
49
questions
0
votes
1
answer
135
views
In a moving car / bus when the car suddenly accelerates do we go back due to inertia or is it due to pseudo force?
When an car moves forward we go back and we have always read that the reason was that our legs stay in contact with the ground and our body goes back since it was at rest and with sudden motion it ...
1
vote
1
answer
54
views
Why the orientation of an object on Earth rotates with the rotation of earth? Is this due to friction?
The moon always faces toward Earth. That's because the moon rotates itself while revolving around the earth. This might be the result of tidal force for a long time, but what about objects on Earth? ...
- 25
0
votes
2
answers
133
views
What experiment should be conducted?
Im self studying physics and came to this question in my textbook:
A passenger in a moving bus with no windows notices that a ball that had been at rest on the aisle suddenly start to move towards ...
2
votes
1
answer
85
views
How does Newton's First Law show the existence of inertial reference frames? [duplicate]
Newton merely stated the law of inertia as:
An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced ...
- 37
0
votes
0
answers
64
views
Doubt regarding lifts (and inertia?)
so i was thinking about lifts and i am confused.
let's say there is a body within a lift (system at rest). Now if the lift starts to accelerate downwards with say an acceleration a ($a>g$). The ...
- 13
0
votes
1
answer
393
views
Is the jerk caused by pseudo force when bus come to stop suddenly?
If a bus stops moving suddenly, we tend to fall forwards due to the inertia of motion of our upper body.
But can we explain the sudden jerk in the forward direction due to some pseudo force? (Because ...
1
vote
6
answers
598
views
What happens to the acceleration from an initial force according to the law of inertia?
Say we hit a golf ball with a club. Hitting the ball requires a force = m*a. According to the law of inertia, velocity should be constant, but how can that velocity be constant if we hit the golf ball ...
- 45
2
votes
2
answers
213
views
Why are there so many fundamental differences between contact forces and gravity?
I had this very fruitful conversation about the inertial motion of charged particles on gravitational/electric fields.
A field force like gravity, can't be felt, it does not produce proper ...
- 350
2
votes
3
answers
163
views
Equivalence principle, geodesics, and proper acceleration are exclusive to general relativity, or they can be understood in classical mechanics terms?
I have been told that "inertial movements, or distinction between proper and coordinate acceleration don't have meaning out of GR".
But now I'm confused, I always though of these concepts in ...
- 350
1
vote
2
answers
166
views
Inertial movement of a body on the surface of a planet being dragged away
When we stand still on the surface of Earth, this is clearly a non-inertial frame.
Inertial frames of reference are characterized by accelerometers measuring zero, so you fell weightless when you: 1) ...
- 350
0
votes
1
answer
329
views
Torque and moment of inertia with bikes
Can someboby please explain to me why it is better for a bicycle/ motor cycle to have lower center of mass when it rounds a turn.
What I could gather from the rule I = mr2
Was that the arm is shorter ...
- 1
0
votes
1
answer
48
views
Red shift/Blue shift as a standard for determining absolute motion
If I begin standing, I can imagine that there are photons of various wavelengths arriving at my location from all directions. If we eliminate local energy coming from stars and radiating bodies, ...
- 533
2
votes
3
answers
334
views
Is pseudo force another form of inertia observed from accelerating frame of reference?
We know that pseudo forces act when we opt for non-inertial frames of reference.
Is pseudo force another form of inertia observed from accelerating frame of reference?
0
votes
2
answers
380
views
Forces on us on a rotating Earth
So the earth is constantly rotating but it doesn't need a force to rotate. It'll rotate indefinitely.(?) But we and other masses on earth need a force on us to continue rotating along with earth? And ...
- 71
29
votes
16
answers
8k
views
When a car accelerates relative to earth, why can't we say earth accelerates relative to car?
When a car moves away from a standstill, why do we say that the car has accelerated? Isn't it equally correct to say that the earth has accelerated in the reference frame of the car? What breaks the ...
- 416