The force required to accelerate an object increases proportionally as the mass increases. This relationship is described by Newton's Second Law of Motion:

Force (F) = Mass (m) x Acceleration (a)

This equation tells us that:

* Direct Proportionality: Force is directly proportional to mass. This means that if you double the mass, you need to double the force to achieve the same acceleration.

* Constant Acceleration: If you want to keep the acceleration constant, you need to increase the force in proportion to the increase in mass.

Example:

Imagine pushing a small toy car and a large truck. To accelerate the toy car to a certain speed, you need to apply a relatively small force. However, to accelerate the truck to the same speed, you need to apply a much larger force. This is because the truck has a much larger mass than the toy car.

In summary:

* More mass = More force needed for the same acceleration

* Less mass = Less force needed for the same acceleration