Lesson 2: a-e
A
- The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
- f=ma
- The direction of force net is the same as acceleration
- Misconception that sustain motion requires a constant force
- Law states that net force causes acceleration
- the numerical value for the net force and the direction of the net force is known, then the value of all individual forces can be determined.
- Gravity= Fgra= m*gravity
- Friction= μ*fnorm
- Equation= μ = ff/fn
- The three major equations that will be useful are the equation for net force (Fnet = m•a), the equation for gravitational force (Fgra = m•g), and the equation for frictional force (Ffrict = μ•Fnorm).
- To find final force use Fnet=m*a
- This equation can be used if mass and acceleration are known
- All objects fall at the same acceleration no matter their mass
- When Newton's second law is examined, the larger the mass, the larger the force smaller the acceleration
- Fnet/M is called gravitational field strength
- Air resistance causes an objects acceleration to slow down this is because the mass is increased (not really but by air)