How does an objects mass influence how much force is needed to change its motion?

According to Newton's second law of motion, force is equal to mass times ... Acceleration is the rate of change of velocity of an object due to a net force. This net ... A: Force and mass are related by their opposite influence on acceleration: Force

Mass is the amount of weight something carries. The heavier an object is, the harder it is to stop because the mass of the object (s) has more molecules, so it would be trying to stop more. That is why more force is required for heavier matter.