Question

An object of mass 3 kg is moving on a friction less surface with a constant velocity of 4 m/s. What amount of force is required to sustain its motion with same velocity?

Answer 1

$\huge\sf\pink{Answer}$

☞ Force = 0 N

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$\huge\sf\blue{Given}$

✭ Mass = 3 kg

✭ Velocity = 4 m/s

✭ Acceleration = 0 m/s²

✭ The place is frictionless

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$\huge\sf\gray{To \:Find}$

◈ The force applied?

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$\huge\sf\purple{Steps}$

So here we have the mass as well as the acceleration of the body so we can directly substitute the values in the second law of motion, that is,

$\underline{\boxed{\red{\sf Force = Mass \times Acceleration}}}$

Substituting the given values,

➝ F = ma

➝ F = 3 × 0

➝ F = 0 N

So here there is no force applied.

Other Way

As it is given that the body is in a frictionless surface. And also given that the body is in a uniform velocity that means there is no acceleration in the body so as there is no acceleration then no force is applied and hence the force is 0 N

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Answer 2

Given :

• Mass is 3 kg
• Velocity is 4 m/s
• Acceleration is 0 m/s²

To find :

• Force applied

Formula used :

• F = ma

Where,

➲ F stands for Force

➲ M stands for Mass

➲ A stands for Acceleration

___________.....

According to the question,

➵ F = ma

Putting the value according to the formula :-

➵ F = 3 × 0

➵ F = 0

So,the force applied is 0 (means no force is applied)...