Question

A constant force acting on a body of mass 4.0 kg change it speed from 3.0ms^-1 to 4.5ms^-1 in 26s. The direction of the motion of the body remain same, the magnitude of the force will be.


All The Best. ​

Answer 1

→ Hey Mate:-

→ Given Question:-

→ A constant force acting on a body of mass 4.0 kg change it speed from 3.0ms^-1 to 4.5ms^-1 in 26s. The direction of the motion of the body remain same, the magnitude of the force will be.

→ To Find:-

→ The Magnitude of the force?

→ Equations Used :-

→ v = u + αt

→ F = mα

→ Solution:-

→Mass of the Body (m) = 4kg

→ Initial Speed of the Body (u) = 3kg

→ Final Speed of the body v = 4.5m/s

→ Time t = 26 speed.

→ Now Acceleration,

→ v = u + αt

→ α = ( v - u / t )

→ α = ( 4.5 - 3 / 26)

→ α = 1.5 / 26

→ α = 0.0576923077

-----------------------------------------------------------

→ Now Force,

→ Use  Newton's second law of motion

→ F = mα

→ F =  4 × 0.0576923077

→ F = 0.230769231

→ ∴  The  Magnitude of the Force is 0.230769231.

-----------------------------------------------------------