Question

4. The force required to change the velocity of an object of mass 5 kg from 6
m/s to 8 m/s in 2 sec is:
a) 5 N
b) 7 Newton
c) 8 newton
d) 5 Newton

correct answer will get brainiest answer​

Answer 1

Answer:

(D) 5 N

Explanation:

$\underline{\bigstar\:\textsf{Given:}}$

• Mass (m) = 5 kg
• Initial velocity (u) = 6 m/s
• Final velocity (v) = 8 m/s
• Time (t) = 2 s

$\underline{\bigstar\:\textsf{To\:find:}}$

• Force (F) = ?

$\underline{\bigstar\:\textsf{Solution:}}$

We remember that $\blue{\sf{Force(F)\:=\:mass(m)\:×\:acceleration(a)}}$

We also remember that $\green{\sf{Acceleration(a)\:=\:\dfrac{v\:-\:u}{t}}}$

Let's first find the acceleration !

$\longrightarrow\:\sf{a\:=\:\dfrac{8\:-\:6}{2}}$

$\longrightarrow\:\sf{a\:=\:\dfrac{2}{2}}$

${\sf{\underline{\underline{\therefore \:Acceleration\:=\:1\:m/s^2}}}}$

Now, find the force required.

$\implies$ F = ma

$\implies$ F = 5 × 1

$\implies$ F = 5 N

${\large{\boxed{\sf{\therefore \:(D)\:5\:Newton✔}}}}$

Hope it helped you dear...