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Please Answer Ques. 7 and 10 with explanations.
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Answered by
8
Hey !!
Here is your answer !!
____________________
★ I think Newton's second law defines force very well as --->
Newton's second law states that --->
Force acting on a body is equal to the mass ( m ) of the body multiplied by acceleration ( a )
That is Force = mass × acceleration !!
So Newton second law also known as the law of force defines force
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Note -- Newton's first law also defines force as it states that a body at rest will remain at rest and a body at motion will remain at motion until and unless any external force is applied on it ! but its the law of inertia !
So for me I think Newton second law !
______________________________
★ A jet engine works in the principle of Newton's third law which states that every action has equal and opposite reaction
Explanation -- A jet engine keeps an aircraft moving forward using a very simple principle, the same that makes an air filled balloon move. Yes, Newton’s third law of motion. Just like the reaction force produced by the air moves the balloon, the reaction force produced by the high speed jet at the tail of the jet engine makes it move forward !
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★ distance x ∝ t½,
velocity v = dx/dt ∝ ½ t−½,
acceleration a = dv/dt ∝ ½ (−½) t−3/2,
Therefore a ∝ v3.
Here is your answer !!
____________________
★ I think Newton's second law defines force very well as --->
Newton's second law states that --->
Force acting on a body is equal to the mass ( m ) of the body multiplied by acceleration ( a )
That is Force = mass × acceleration !!
So Newton second law also known as the law of force defines force
_______________
Note -- Newton's first law also defines force as it states that a body at rest will remain at rest and a body at motion will remain at motion until and unless any external force is applied on it ! but its the law of inertia !
So for me I think Newton second law !
______________________________
★ A jet engine works in the principle of Newton's third law which states that every action has equal and opposite reaction
Explanation -- A jet engine keeps an aircraft moving forward using a very simple principle, the same that makes an air filled balloon move. Yes, Newton’s third law of motion. Just like the reaction force produced by the air moves the balloon, the reaction force produced by the high speed jet at the tail of the jet engine makes it move forward !
__________________________
★ distance x ∝ t½,
velocity v = dx/dt ∝ ½ t−½,
acceleration a = dv/dt ∝ ½ (−½) t−3/2,
Therefore a ∝ v3.
RehanAhmadXLX:
7 and 10
not 8th
uff sorry not seen wait a min
Not clear
Answered by
5
hello friend....!!!
question number 7 )
• The answer is option ' A '
it's because, Newton's first law of motion only gives the qualitative definition of the force, that is it tells about that , the force is only the influence behind the moving object.
Example : when a book is pushed which is on the table comes to rest after certain time, but here the main reference is the force that is applied at the first place to move the book.
Question number 10 )
• the answer is option ' C '
according to the question it is given that,
Distance (S) α T ^ 1 / 2
so with this given condition, now we should find about acceleration,
S = k T ^ 1 / 2
implies, V = ds / dt.
therefore, V = d ( k T ^1/2) / dt.
implies, V = 1/2 kT ^ -1/2
we know that acceleration is equal to the differentiation of the velocity,
therefore,
a = dv / dt
implies, a = d ( 1/2 kT^-1/2) / dt
therefore,
a = 1 / 4 kT^ -3/2
implies,
a = 1/4 kV^3 .
therefore,
a α V^3
-----------------------------------------
hope it helps...!!!
question number 7 )
• The answer is option ' A '
it's because, Newton's first law of motion only gives the qualitative definition of the force, that is it tells about that , the force is only the influence behind the moving object.
Example : when a book is pushed which is on the table comes to rest after certain time, but here the main reference is the force that is applied at the first place to move the book.
Question number 10 )
• the answer is option ' C '
according to the question it is given that,
Distance (S) α T ^ 1 / 2
so with this given condition, now we should find about acceleration,
S = k T ^ 1 / 2
implies, V = ds / dt.
therefore, V = d ( k T ^1/2) / dt.
implies, V = 1/2 kT ^ -1/2
we know that acceleration is equal to the differentiation of the velocity,
therefore,
a = dv / dt
implies, a = d ( 1/2 kT^-1/2) / dt
therefore,
a = 1 / 4 kT^ -3/2
implies,
a = 1/4 kV^3 .
therefore,
a α V^3
-----------------------------------------
hope it helps...!!!
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