Newton's second law of motion can be described by this equation:
resultant force = mass × acceleration
This is when:
The equation shows that the acceleration of an object is:
In other words, the acceleration of an object increases if the resultant force on it increases, and decreases if the mass of the object increases.
The mass of an object is measured in kilograms (kg). The mass of an object is also a measure of its resistance to any change in its motion. This tendency of an object to continue in its current state (at rest or in uniform motion) is called inertia.
The ratio of force over acceleration is called inertial mass. Inertial mass is a measure of how difficult it is to change the velocity of an object.
Calculate the force needed to accelerate a 22 kg cheetah at 15 m/s2.
Calculate the force needed to accelerate a 15 kg gazelle at 10 m/s2.