Answer:
125 N
Explanation:
Force: This can be defined as the product of the mass of a body and its acceleration. S.I unit of force is Newton (N).
Mathematically, Force can be expressed as,
F = ma................... Equation 1
Where F = force, m = mass, a = acceleration of the body.
Making m the subject of the equation,
m = F/a ............... Equation 2.
Given: F = 40 Newtons, 8 m/s²,
Substituting into equation 2
m = 40/8
m = 5 kg,
When the acceleration a = 25 m/s²
Substitute into equation 1
F = 25×5
F = 125 N.
Hence the needed = 125 N.