Flashcards
Forces
Cards in this deck (17)
- 1Formula for average speedAverage speed=
Distance Travelled
total time taken - 2Other formula for average speedFinal speed+Starting speed
2 - 3AccelerationChange in speed (m/s)
Time taken (s) - 4Formula for accelerationa = v-u
t - 5what are the units for acceleration?m/s^2
- 6what does STUVA stand forS= displacement T= time
U= initial velocity
V= final velocity A= acceleration - 7Equations of motionEquations of motion
- 8when there is no acceleration and v is constant...s
v=
t - 9to find the av.velocityu+v
2 - 10the formula for displacement (the distance an object travels)v * t
or
s= u+v t
2 - 11to find the final speedv= u+at
- 12examplev=at 40=u+(2*20)
v=40 u=?
a=2m/s^2 t=20
answer: u=0m/s^2 - 13Kinetic Energydepends upon an objects velocity and mass
- 14formula and equation for kinetic energyKE= 1/2 * mass*velocity^2
- 15What is Kinetic Energy measured inJoules (J)
- 16the braking distance ...the braking distance of a vehicle increases as the speed of the vehicle increases because the vehicle has more kinetic energy it takes longer for it to get back to its resting position
- 17How to work out the speed when knowing the distance and time..speed= distance
time