Question

A body of mass 20kg is moving with a uniform velocity of 2m/sec.Calculate force acting on it.

40N

10N

zero

can not be calculated​

Answer 1

Heyaa

The body is moving with uniform velocity , hence its acceleration is zero and therefore, from Newton’s second law ( F = ma), the force acting on it is zero.

[ F = 0 ]

Hope it Helps !!

Answer 2

$\bold{\pink{ \frak{Given}}}\begin{cases} \sf Mass \: (m) = 20 \: kg \\ \\ \sf Initial \: velocity \: (u) = 2 \: ms ^{ - 1} \\ \\ \sf final \: velocity \: (v) = 2 \: ms ^{ - 1} \end{cases}$

$\underline{ \bigstar \: \textsf{According to the Question now ;}}$

$: \implies \displaystyle \sf \:Acceleration = \frac{v - u}{t}$

$: \implies \displaystyle \sf \:Acceleration = \frac{2 - 2}{t}$

$: \implies \displaystyle \sf \:Acceleration = \frac{0}{t}$

$: \implies \underline{ \boxed{ \displaystyle \sf \:Acceleration = 0 \: ms ^{ - 2} }}$

_________________…

$\dashrightarrow\displaystyle \sf \:Force = mass \times acceleration$

$\dashrightarrow\displaystyle \sf \:Force = 20 \: kg \times 0 \: ms ^{ - 2}$

$\dashrightarrow\displaystyle \sf \:Force = 0 \: kg.ms ^{ - 2}$

$\dashrightarrow \underline{ \boxed{\displaystyle \sf \:Force = 0 \: N}}$