Question

class 9 chapter force and law of motion.​

Answer 1

Explanation:

we know F=MxA

:. 10=2 x A

A= 10/2 = 5

I think so

Answer 2

Provided that:

• Acceleration = 2 m/s²
• Force = 10 Newton

To calculate:

• Mass of the object

Solution:

• Mass of the object = 5 kg

Using concept:

• Force formula

Using formula:

• F = ma

(Where, a denotes acceleration, F denotes force and m denotes mass)

Required solution:

~ We just have to put the values according to the formula, and have to carry on!

$:\implies \sf Force \: = mass \times acceleration \\ \\ :\implies \sf F \: = m \times a \\ \\ :\implies \sf F \: = ma \\ \\ :\implies \sf 10 \: = m(2) \\ \\ :\implies \sf 10 \: = m \times 2 \\ \\ :\implies \sf \dfrac{10}{2} \: = m \\ \\ :\implies \sf \cancel{\dfrac{10}{2}} \: = m \\ \\ :\implies \sf 5 \: = m \\ \\ :\implies \sf m \: = 5 \: kg \\ \\ :\implies \sf Mass \: = 5 \: kg \\ \\ {\pmb{\sf{Henceforth, \: solved!}}}$

Verification:

~ Now let us check out our result!

$:\implies \sf Force \: = mass \times acceleration \\ \\ :\implies \sf F \: = m \times a \\ \\ :\implies \sf F \: = ma \\ \\ :\implies \sf 10 = 5(2) \\ \\ :\implies \sf 10 = 5 \times 2 \\ \\ :\implies \sf 10 = 10 \\ \\ :\implies \sf L.H.S \: = R.H.S \\ \\ {\pmb{\sf{Henceforth, \: verified!}}}$

Our result is fully correct!