P10: Force And Motion Flashcards
What does the possible acceleration of a vehicle depend on?
It’s mass and the amount of thrust force
What does Newton’s second law state?
That the force applied to an object is directly proportional to its acceleration.
What’s the equation linking mass acceleration and force?
F=m x a
What’s the definition of mass?
A measurement of all the matter (stuff) an object is made up of.
What’s the units of mass?
Kg
What’s the definition of a weight?
The force an object has on another body
What’s the units for weight?
Newtons
What’s the equation linking m, g and W
W=mg
What’s the definition of terminal velocity?
Reached by an object when the drag force is equal and opposite to the force making it move.
What is thinking distance?
The distance travelled by a vehicle while the driver is reacting to a hazard.
What are factors affecting thinking distance?
Speed of car
Vision
Bad weather conditions
Age of driver
Drugs
Alcohol
Tiredness
Emotions
Distractions
What is braking distance?
The distance travelled by a vehicle after the brakes have been applied.
What are factors affecting braking distance?
Bad brakes
Bad weather conditions - slippy roads
Road surface - bumpy
Tyre condition
Speed
What is stopping distance?
The total distance travelled by a vehicle from when the hazard is spotted to when the car is stationary.
How do you work out stopping distance?
Braking distance + Thinking distance
