Momentum Flashcards
Equation for speed
Speed=distance (divided by) time
Equation for acceleration with time
Acceleration= change in velocity (divided by) time
Acceleration is measured in m/s(2)
The equation of newtons 2nd law
F=ma
If f =0 than a=0
Equation for velocity with displacement
V=s(divided by ) t
V- velocity (m/s)
S- displacement (m)
T- Time (s)
How do you convert from
m/s to mph
Multiply by 2.2
Equation with velocity and acceleration
V(2) - U(2)=2as
V-final velocity (m/s)
U- initial velocity (m/s)
A- acceleration (m/s(2))
S- displacement (m)
How is terminal velocity reached? (Skydiver)
When the weight = air resistance
When the skydiver first jumps what is the resultant force?
Weight
So therefore he will accelerate
When the skydiver opens his parachute what is the resultant force?
Air resistance
So he will accelerate upwards
How to calculate stopping distance
Stopping distance = thinking distance +breaking distance
All in m
What factors affect thinking distance
Alcohol
Drugs
Distractions
What factors affect braking distance
Tyres
Brakes
Road conditions
Equation for momentum
P=mV
P- momentum (Kgm/s)
m- mass (Kg)
V- velocity (m/s)
In a system momentum is always…
… conserved
Momentum system (gun example)
Momentum before firing = momentum after firing
