Question

Physics
Define Newton's first law, second law, as well as third law with full solution within single answer. First person to have the most accurate wording will be awarded medals from all participants.

Answer 1

Newton' first law=inertia

Answer 2

*full solutions

Answer 3

inertia=an object will keep moving unless unless acted upon by an unbalanced force

Answer 4

correct

Answer 5

1st law - a body tends to remain at its original position. :) nd this is called inertia .example - when u shake a tree the fruits fall down cause they try to resist any change in their original position nd thus they fall :)

Answer 6

second law: when force is applied to an object, acceleration is made

Answer 7

@imqwerty you are contradicting yourself

Answer 8

lol :D

Answer 9

@heretohelpalways not quite. Pay attention to the proportion

Answer 10

between the force applied and resulting acceleration.

Answer 11

with mass being the constant

Answer 12

As well as the resulting acceleration with changing mass with constant being the force applied.

Answer 13

Try to draw a relationship and describe each of them

Answer 14

mass*acceleration=force

Answer 15

yes

Answer 16

BUt

Answer 17

Try to explain the relationship between the amount of force applied and resulting acceleration.

Answer 18

AND relationship between mass and acceleration given a force assumed to be constant

Answer 19

example: 300*0.07= 21 newtons

Answer 20

Yes.

Answer 21

:)

Answer 22

Final answer being the applied force and resulting acceleration have a PROPORTIONAL RELATIONSHIP whereas mass and acceleration has INVERSE PROPORTIONAL RELATIONSHIP when force is kept constant.

Answer 23

In essence.

Answer 24

how did i contradict myself

Answer 25

elaborate

Answer 26

balanced forces=net force of zero=that's not the case

Answer 27

hmmmmm, I'll think of something

Answer 28

Oh astrophysics came

Answer 29

recoil of a gun when it fires

Answer 30

That's a spot on

Answer 31

can you elaborate the concept?

Answer 32

Why aren't you shooting yourself with that? Why does recoil not kill you? Account for the drastic difference of surface areas being responsible for dispersion of forces into two opposite directions perfectly alined with one another.

Answer 33

example of 3rd law - when u walk u put force on ground nd the ground puts a normal force on u wid the help of which u can walk :)

Answer 34

sorry, got to go now. I am being serious. I'll answer this question again later or tomorrow. I'll give a medal to imqwerty.

Answer 35

Great! I hope you enjoyed my contest series @heretohelpalways

Answer 36

I aim to make this stimulating for everyone .

Answer 37

Mr. Astrophysics what have you got to say?

Answer 38

:) #$$%#$%

Answer 39

I'll keep it simple I suppose. Newton's first law is a body acted on by no net forces with constant velocity (that means 0 acceleration) you can see this with a linear position time graph. You can also see this on a ice hockey table, the slicker the surface further the puck slides (given an initial velocity of course). So what you want to see from here is that when a body is at rest or moving with a constant velocity, we say it's at equilibrium, mathematically. \[\sum \vec F = 0\] don't forget the components!


Newton's second law of motion is simply is net force = mass x acceleration, \[\sum \vec F = m \vec a\] writing it out we can say if a net external force acts on a body, the body accelerates. The direction of acceleration is the same as the direction of the net force where the m x a = the net force. I think you can think of your examples for this, pretty straight forward.

Newton's third law often called action - reaction, it is stated as if a body A exerts force on body B (action) , then the body B exerts a force on body A (reaction), the two forces have the same magnitude but are opposite in direction. \[\vec F_{A~on~B} = - \vec F _{B ~ on~A}\] it's like a rocket blasting off, or kicking a ball, anything really.

Hope that helps!

Answer 40

@imqwerty medal to astrophysics

Answer 41

Haha, thanks :)

Answer 42

Are you a professional physicist?

Answer 43

Nope! But I do aspire one to be!

Answer 44

We do have one professional physicist here @Michele_Laino :-)

Answer 45

Wow

Answer 46

Are you taking physics in your unit I assume?

Answer 47

Yup! I still have a long way to go haha.

Answer 48

Certainly any degree of comparison would be absurd to 1st year medical student. XD

Answer 49

Physics is just super amazing

Answer 50

Haha, well medical students run away from physics :P

Answer 51

Thanks for the medal, it was fun!

Answer 52

Likewise! See you around.

Answer 53

:D

Answer 54

`

Answer 55

Interesting, Newton formulated his Second Law as a way to define acceleration, saying that a net force acting on a mass produces an acceleration in the same direction as the net force, i.e.\[\vec{a} = \frac{ \vec{F} }{ m }\]Only later was it adopted in its now familiar form\[\vec{F} = m \vec{a}\]

Answer 56

Actually Newton proposed his second law as such, considering momentum \[\vec F = \frac{ d \vec p }{ dt }\]