All Questions
6
questions
5
votes
6
answers
2k
views
What actually is impulse?
In my textbook it is mentioned that “impulse is used to get an idea of about the change in dynamical state of a moving particle”,but what does impulse actually mean?
- 79
14
votes
9
answers
8k
views
Why is momentum defined as mass times velocity?
Why is momentum defined as mass times velocity? I asked this question because everywhere people try to answer this by saying that $F=ma$ and if we integrate it with respect to ${\rm d}t$ we can get $p=...
- 209
0
votes
2
answers
5k
views
Impulse as the time derivative of force
Momentum is the time derivative of force. $F = \frac{dp}{dt}$.
But isn't impulse $J=Ft$, $F=\frac{J}{t}$?
Can impulse be the time derivative of force too, or is it just defined as an integral?
- 395
7
votes
3
answers
1k
views
Why is the definition of inertial mass circular? [duplicate]
On Wikipedia, the definition of inertial mass is:
Inertial mass is the mass of an object measured by its resistance to
acceleration. And, can be evaluated using $F = ma$, Newton's second
law.
...
- 972
0
votes
2
answers
253
views
When momentum coincides with impulse
If an object is pushed for some time by some force from a resting state, can I say that at the exact moment the force is removed, impulse equals momentum?
- 220
8
votes
4
answers
12k
views
The elusive difference between force and impulse
Impulse is defined as the product of a force $F$ acting for a (short) time $t$, $J = F*t$, and that is very clear.
What I find difficult to understand is how a force can exist that doesn't act for a ...
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