Class Opener: What do these 3 Graphs show?
Kinematics is the study of objects in Motion
Grade 11 Physics
Recall the definitions of position, distance, displacement, speed, velocity and acceleration and distinguish whether these are scalars or vectors.
Use the equations of motion involving distance/displacement, speed/velocity, acceleration and time in calculations and in interpreting experimental results.
Plot and interpret DTVA Graphs distance-time, velocity-time and acceleration-time graphs calculating the area under velocity-time graph to work out distance travelled for motion with constant velocity or constant acceleration.
Scalar is a quantity that has only magnitude
Vector is a quantity that has magnitude and direction
electric field strength
s = ½ (u+v)t
v = u +at
v2 = u2 +2as
s = ut + ½ at2
When 3 quantities are know the other 2 can be calculated
These equations only apply during constant acceleration (motion is one-dimensional motion with uniform acceleration).
When the acceleration is zero, s = ut.
s = final displacement (metres) u = initial velocity (metres per second, ms-1) v = final velocity (ms-1) a = acceleration (metres per second per second, ms-2) t = time taken (seconds, s)
Final velocity: vf = v0 + a(t)
Distance traveled: d = v0 t + (½)at2
(Final velocity)2: vf2= (v0 t)2 + 2ad
Distance traveled: d = [(v0 + vf)/2]*t
Acceleration is the second derivative of displacement and velocity is the first derivative of displacement
give the area under a curve