Question

A force of 10n acts on a body of mass 2 kg for 3s,initially at rest.Calculate its velocity acquired

Answer 1

• Force (F) = 10 N

• Mass (m) = 2 kg

• Time (t) = 3 sec

• Initial velocity (u) = 0 m/s [because body is at rest

_____________ [GIVEN]

• We have to find the velocity (v) of the body.

______________________________

$\boxed{*\:F\:=\:ma}$

$\implies$ 10 = 2 × m

$\implies$ 2m = 10

$\implies$ $\boxed{m\:=\:5}$

______________________________

From first equation of motion.

$\boxed{*\:v\:-\:u\:=\:at}$

$\implies$ v - 0 = 5 × 3

$\implies$ $\boxed{v\:=\:15\:m/s}$

_______________________________

$\textbf{Final velocity (v) = 15 m/s}$

____________ [ANSWER]

______________________________

Answer 2

Answer:

final velocity is 15 m/sec