Question

1. Explain Newton's Second Law of Motion 2. Explain law of Conversation of Momentum 3. what is the relationship between force & Acceleration 4. Calculate force of body whose Mass Is 2 kg & is moving with 4 m/s² .

Answer 1

$\red {\bf Question \: 1}$

• Explain Newton's Second Law of Motion

$\underline{ \purple { \bf Answer}}$

Newton's Second law States that whatever the Force is acting on any body is always equal to the product of it's Mass and Acceleration, we can simply say more force gives smaller acceleration.

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$\red {\bf Question \: 2}$

• Explain law of Conversation of Momentum

$\underline{ \purple { \bf Answer}}$

The law of Conservation says that momentum will always remain constant until & unless an external Force is applied and also states that Momentum can neither be created nor be destroyed

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$\red {\bf Question \: 3}$

• What is the relationship between force & Acceleration

$\underline{ \purple { \bf Answer}}$

Newton's Second law of Motion describes the realation between Force and Acceleration

• Force is directly proportional to Acceleration ( F ∝ a)
• If Force applied is increased, acceleration also increases
• Similarly, if Force applied is decreased, acceleration also decreases
• Force equals mass time acceleration ( F = m × a)

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$\red {\bf Question \: 4}$

• Calculate force of body whose Mass Is 2 kg & is moving with 4 m/s².

$\underline{ \purple { \bf Answer}}$

Given

• Mass = 2 kg
• Acceleration = 2 m/s²

To Find

• Force applied on the Body

Solution

Formula :- $\pink{\boxed {\sf F = m \times a }}$

Substituting Values

$\longrightarrow \sf F = 2 \times 4$

$\longrightarrow \sf F = 8$

Therefore, Force applied is 8 Newton

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Answer 2

ǫuestion 1)

• Explain Newton's Second Law of Motion.

ᴀɴsᴡᴇʀ :

According to Second law of motion the rate of change of momentum of a body is directly proportional to the force applied on it, and takes place in the direction in which force acts .

$\bf \xrightarrow{ \bf \: F}(m) {}^{u} \_\_\_ + \_\_\_(m) {}^{v}$

$\large \quad \rm \: Force \propto \: \frac{change \: in \: momentum}{time \: taken}$

$\large \quad \rm \: Force \: \propto \: \frac{mv - mu}{T}$

$\large \quad \rm \: Force \: \propto \:m (\frac{v - u}{T} )$

$\large \quad \rm \: Force \: \propto \:ma \quad (a = \frac{v - u}{t} ) \small \: by \: acceleration$

$\large \quad \rm \: Force \: = k \times m \times a$

• Putting k = 1

$\large \quad {\underline{\boxed{ \bf \red{F = ma}}}}$

So,

› Force = Mass × Acceleration

› unit of force = unit of mass × unit of acceleration.

⠀⠀⠀⠀⠀⠀⠀⠀⠀= kg × m/s²

⠀⠀⠀⠀⠀⠀⠀⠀⠀= kgm/s²

⠀⠀⠀⠀⠀⠀⠀⠀⠀= Newton

So,

$\large \quad {\underline{\boxed{ \bf {\red{1N = 1kgm/s {}^{2} }}}}}$

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Question 2)

• Explain law of Conversation of Momentum.

According to law of conservation of momentum when two or more bodies act upon one another their total momentum remains constant ( or another provided no external force are acting.)

This law can also be stated as :-

$\green{ \rm \:Momentum \: can \: neither\:be \: created \: nor \:be\: destroyed .}$

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Question 3)

• what is the relationship between force & Acceleration.

Answer :

Newton's second law of motion gives us a relationship between force and acceleration.

• F = ma

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Question 4)

• Calculate force of body whose Mass Is 2 kg & whose acceleration 4 m/s² .

Given :

• Mass = 2kg
• Acceleration = 4m/s²

we know that,

• Force = mass × Acceleration

➔ F = 2 × 4

➔ F = 8kgm/s²

➔ Force = 8N

Hence,

• Force = 8N

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