Motion and forces Flashcards
(16 cards)
What is a scaler quantity
A quantity with magnitude (size)
What is a vector quantity
A quantity with both magnitude and specific direction
What is the equation for acceleration
a=v-u/t
What is the equation for velocity
v²-u²=2ax
X=distance
What is one g in free fall
10m/s²
What is newtons first law
An object will stay at rest or uniform unless acted upon be an external force
What is Newtons second law
F=ma
What is the equation for weight
W=mg
g=gravitational field strength
How is weight measured
It is the mass that gravity acts upon which is therefore measured in N
What is the Inertial Mass
How heavy something is
What is Newtons 3rd Law
If body A exerts a force on body B. Body B exerts the same but oppositely directed force
What is a test that can be used to test reaction speed
Ruler drop test
What is the stopping distance of a vehicle
The thinking and braking distance added together in total
What are some factors that can affect the stopping distance
Drugs and distractions
What are some of the dangers of large decelerations
Brakes overheating, loss of control, increased risk of injury
What is the calculation for work
W=Fxd
work = force x distance
