Still Confused?

Try reviewing these fundamentals first.

Still Confused?

Try reviewing these fundamentals first.

Nope, I got it.

That's that last lesson.

Start now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started Now- Intro Lesson5:22
- Lesson: 1a2:39
- Lesson: 1b5:35
- Lesson: 1c6:04

In this lesson, we will learn:

__Notes:__

**Newton's Second Law**

- Newton's second law of motion
- Problem solving with Newton's second law of motion

__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])

$\Sigma \vec{F} = \vec{F}_{net} = m\vec{a}$

$\Sigma \vec{F}:$ 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 $(m/s^{2})$

- IntroductionIntroduction to Newton's second law

$\cdot$Meaning of Newton's second law

$\cdot$Newton's second law formula

$\cdot$Newton, the unit of force - 1.
**Applying Newton's second law**a)What is the unbalanced force required to accelerate a 1370 kg car at 4.25 $m/s^{2}$?b)What is the unbalanced force required to bring a 995 kg car travelling at 11.5 m/s to a stop in 30.0 m?c)An apple falls from a tree.i. What is the force of gravity acting on a falling 0.200 kg apple?

ii. If the apple is accelerated downwards at 9.53 $m/s^{2}$, find the force of air resistance acting on the apple.