Question

A body of mass 5kg starts and rolls down 32m of an inclined plane is 4s. find the force acting on the body?​

Answer 1

Answer:

I think its the answer..

Answer 2

Answer:

$\bigstar{\bold{Force\:on\:the\:body\:=\:20\:N}}$

Step-by-step explanation:

$\Large{\underline{\underline{\it{Given:}}}}$

• Mass of the body (m) = 5 kg
• Distance covered (s) = 32m
• Time taken (t) = 4 s

$\Large{\underline{\underline{\it{To\:Find:}}}}$

• Force acting on the body (F)

$\Large{\underline{\underline{\it{Solution:}}}}$

⯮ First we need to find the acceleration of the body.

⯮ By the second equation of motion,

  s = ut + 1/2 × a × t²

⯮ Substituting the given datas, we get

   32 = 0×4 + 1/2 × a × 4²

   a = 4 m/s²

⯮ By Newton's second law of motion,

  F = ma

⯮ Substitute the datas, we get

   F = 5 × 4

$\boxed{\bold{Force\:=\:20\:N}}$

$\Large{\underline{\underline{\it{Notes:}}}}$

⯮ The three equations of motion are:

• v = u + at
• s = ut + 1/2 × a × t²
• v² - u² = 2as

⯮ Force is directly proportional to mass and acceleration of the body.

⯮ The unit of Force is Newton (N) in SI system and dyne in CGS system.