Kinematics
by Olivia Washington
1. motion graphs
1.1. velocity-time graph
1.1.1. gradient = acceleration
1.1.2. area under curve = change in displacement
1.2. displacement-time graph
1.2.1. gradient = velocity
1.2.2. area under curve is meaningless
1.3. acceleration-time
1.3.1. gradient is meaningless
1.3.2. area under curve = change in velocity
2. types of motion
2.1. uniform motion
2.1.1. constant velocity, 0 acceleration
2.2. uniform acceleration
2.2.1. constant acceleration
2.3. non-uniform motion
2.3.1. changing acceleration
2.4. projectile motion
2.4.1. under constant gravitational acceleration
2.4.2. horizontal = Ax = 0, Vx = constant
2.4.3. vertical = Ay = -g, equations of motion apply
3. equations of motion
3.1. v = u + at
3.1.1. only applicable under constant acceleration
3.2. s = ut + 1/2 at^2
3.3. v^2 = u^2 + 2as
3.4. s = ((v+u)/2 )t
4. key quantities
4.1. s = displacement
4.1.1. change in position (vector) (m)
4.2. u = initial velocity
4.2.1. rate of change of displacement (m/s)
4.3. v = final velocity
4.4. a = acceleration
4.4.1. rate of change of velocity (m/s^2)
4.5. t = time
4.5.1. scalar quantity (s)