P3 - Forces For Transport Flashcards
What is the equation for distance?
Distance = speed x time
Distance = average speed x time
Explain what a flat line, straight line and curved line show?
- Flat line = stopped
- Straight line = steady speed
- Curved line = acceleration / deceleration
How do you find the speed of a distance time graph?
Gradient
What is the equation for acceleration?
Acceleration = change in speed / time taken
What is gravity?
The attraction between all masses
What is the equation for weight?
Weight = mass x gravitational field strength
What are the six different forces?
1) Gravity
2) Reaction force
3) Thrust
4) Drag
5) Lift
6) Tension
What are the forces like on a stationary object?
They are all balanced
What are the forces like on a object at a steady speed?
They are all balanced
What are the forces like if an object is accelerating or decelerating?
The forces are unbalanced
What does friction do?
Slows things down
What is terminal speed?
The maximum speed it can get
What does an objects terminal speed depend on?
Their drag
What is the equation of force?
Force = mass x acceleration
What is the equation for stopping distance?
Stopping distance = thinking distance + braking distance
What are the four main factors of braking distance?
1) Speed
2) Weight
3) Brakes
4) Grip
What is the equation for momentum?
Momentum = mass x velocity
What are h the equation for force acting?
Force acting = change in momentum / time taken for change to happen
What are three car safety features?
1) Crumple zone
2) Seat belts
3) Air bags
What is work done?
When a force moves an object
What is the equation for work done?
Work done = force x distance
What is gravitational potential energy (GPE)?
The energy given to an object due to its height
What is the equation for gravitational potential energy (GPE)?
GPE = mass x gravity x height
What is kinetic energy (KE)?
The energy of movement
What is the equation for kinetic energy (KE)?
KE = 0.5 x mass x speed(2)
What is the equation for kinetic energy transferred?
Kinetic energy transferred = work done by brakes
What do falling objects do besides fall?
Convert GPE into KE
What is the equation for power?
Power = work done / time taken
Power = force x speed
What is fuel consumption?
The amount of fuel used
What can effect fuel consumption?
- Driving style
- Weight
- Drag
What do cars produce when they burn fuel?
They release emissions
What are the three things cars can run on?
1) Fossil fuels
2) Biofuels
3) Electricity
