Question

. The velocity of a body of mass 100g increases from 4m/s to 8m/s in 2s.
Calculate the force required to do so?

Answer 1

Answer:

F = ma= 0.1 x (8-4) /2

F=0.2N

Answer 2

$\underline{\underline{\orange{\textbf{Step - By - Step - Explanation : -}}}}$

To Find :

• Force = ??

Solution :

• mass of body (m) = 100g = 0.1kg
• initial velocity (u) = 4m/s
• Final velocity (v) = 8m/s
• Time (t) = 2 seconds

$\huge\underline{\underline{\red{\textbf{Explanation : -}}}}$

we know that Force = mass × acceleration we have mass but not acceleration so Firstly we need to find acceleration of body.

• Acceleration = (v - u)/t

›› a = (8 - 4)/2

›› a = 4/2

›› a = 2m/s²

Now,

• Force = mass × acceleration

›› F = 0.1 × 2

›› F = 0.2 N

Hence

• Force = 0.2 Newton

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