Motion and forces Flashcards
reaction time
Amount of time taken from someone to respond to an event/ stimulus
reaction distance
length for a vehicle (car/person) to stop after realising what’s happening
-Depends on some ones reaction time
Braking time
Amount of time it takes for a vehicle to come to a stop after brakes are applied
Braking ditance
distance it takes for a vehicle to come to a complete stop after brakes are applied
Speed
How fast an object can move from one point to another
Acceleration
How quickly velocity changes
Speed graphs
Y axis= Distance
X axis= TIme
rise/run = distance/time= speed
Position graphs
Y axis=
X axis=
rise/run=
Distance def
Length of the path travelled
Displacement
straight line measurement from start to finish which states direction
Measuring speed
Ticker timer
Radar ‘gun’
Ultra sonic sensors
Laser ‘gun’
Light gates
Digitectors
Ticker timers
Records an object movement by dotting on paper regularly
- More dots=Slower
- Less dots= Faster
Advantages- Cheap
Disadvantages- paper jam and manual use
Laser gun
Infared transmitter
- Detects solid objects
Advantages- High tech
Disadvantage- Dangerous
Velocity
Similar to speed
Needs direction
Acceleration graphs
Y axis= Speed
X axis= TIme
Types of Forces
Push, Pull, or twist
Vectors
Show direction of the force
Length of vector= Amount of force
Newtons 1st law
Objects that are moving or at rest, will not change their motion unless acted upon by an unbalanced force
Newtons 2nd law
Acceleration of an object depends on its mass and amount of force applied
F=mxa
Newtons third law
for every action there is an equal and opposite reaction
