Newton's second law of motion  Forces and Newton's Laws
Newton's second law of motion
Lessons
Notes:
In this lesson, we will learn:
 Newton's second law of motion
 Problem solving with Newton's second law of motion
Notes:
 Newton's second law: If a net force acts on an object, its velocity changes. The acceleration is proportional to the magnitude of the net force, and inversely proportional to the mass, or $\vec{F}_{net}=ma$
 The force of gravity acting on an object is $\vec{F}_{g}=mg$, where $g$ is acceleration due to gravity (9.81 m/s2 [down])
Newton's Second Law
$\Sigma \vec{F} = \vec{F}_{net} = m\vec{a}$
$\Sigma \vec{F}:$ sum of all forces, in newtons (N)
$\vec{F}_{net}:$ net force, in newtons (N)
$m:$ mass, in kilograms (kg)
$\vec{a}:$ acceleration, in meters per second squared $(m/s^{2})$

1.
Applying Newton's second law