Answer :
The magnitude of the resultant force acting on the mass is 20N.
Force is an influence that can change the motion of an object. Objects with mass can change their velocity with forces. Forces can also be described intuitively by pushing or pulling. A force has both magnitude and direction and is a vector quantity. It is measured in the SI unit Newton (N). Standard mechanical size. Force is denoted by the symbol F (formerly P). The original form of Newton's Second Law states that the net force acting on a body is equal to the rate at which its momentum changes with time. If the mass of an object is constant, this law means that the acceleration of the object is directly proportional to the net force acting on it, goes in the direction of the net force, and is inversely proportional to the mass of the object.
Given;
mass=4Kg
Speed(v)=2 m/s
Radius(r)= 0.8 m
Centripetal force (F) = m v^2/r
F = 4.0kg (2.0 m/s)^2 / 0.80 m = 20 kg m/s^2 = 20 N
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