Work, Machines & Mechanical Advantage

Newton's Second Law states that the force acting on an object is equal to the mass of that object multiplied by its acceleration (F = ma).

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it. It measures how much a machine multiplies force.

Friction and gravity (weight) affect the efficiency of simple machines, causing it to be less than 100%.

Force is any push or pull on an object that can cause it to accelerate.

Force (F) is calculated using the formula F = mass (m) × acceleration (a).

According to Newton's Second Law, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

Output force is also known as resistance or load.

Efficiency is the ratio of useful work output to total work input, expressed as a percentage.

Friction is a force that opposes the motion of an object, acting parallel to the surfaces in contact.

The conservation of force principle states that energy cannot be created or destroyed, only transformed, which is crucial in understanding how machines work.