Zusammenfassung der Ressource
Physics - Dynamics & Space
- Vectors and
Scalars
- Scalars have magnitude only
- Speed
- Distance
- Mass
- Energy
(kinetic too!!!)
- Vectors have
magnitude and
direction
- Velocity (v=s/t)
- Displacement (s)
- Acceleration
(a=[v-u]/t)
- Force (F=ma)
- Weight (W=mg)
- Instantaneous Speed
- Measured over very short
distances or time intervals
- Light Gate Experiment
- Instantaneous Speed =
length of card / time light
beam is broken
- Average Speed
- Measured over
longer distances or
time intevals
- Newton's Laws of Motion
- Newton's 1st Law of Motion
- An object will remain at rest or at a constant
speed in the same direction unless acted upon by
an external unbalanced force
- Newton's 2nd Law of Motion
- Force = mass x acceleration
- F=ma
- Newton's 3rd Law of Motion
- For every action there is
an equal and opposite
reaction
- If A exerts a force on B, then B exerts an
equal and opposite force on A.
- Projectiles
- Projectile motion is viewed as two separate motions
- Horizontal
- The projectile remains at a constant
speed horizontally. Excluding air
resistance, there are no forces acting
upon the projectile.
- Vertical
- The projectile accelerates downwards
at 9.8 m/s^2 due to weight (the force
due to gravity)
- The projectile follows a curved path because it is
travelling at a constant speed horizontally, but
accelerating vertically downwards at the same time.