A mass m is acted on by a resultant force of 28.6 N in the upward direction. The acceleration of the mass is 5.72 m/sec2 upward. What is the mass?

4.5 f=ma

mass= force/acceleration

To find the mass, we can use Newton's second law of motion, which states that the force acting on an object is equal to its mass multiplied by its acceleration. Mathematically, it can be written as:

Force = mass × acceleration

In this case, the mass is the unknown variable we're trying to find, so we'll rearrange the equation to solve for mass:

mass = Force / acceleration

Given that the force is 28.6 N and the acceleration is 5.72 m/sec², we can substitute these values into the equation to find the mass:

mass = 28.6 N / 5.72 m/sec²

Simplifying this expression will give us the mass:

mass = 5 kg

Therefore, the mass of the object is 5 kg.